Language and currency:
en | £
Country of collecting the order:
Great Britain

Login problem

There are problems with logging in

You can't log in to your account in our store?below you will find a list of the most common causes of login problems and proven ways to solve them. All tips are described in accessible language and directed to non-technical people. If, despite applying the advice, you still can't access your account, contact us - we'll be happy to help.

1. Most common causes of login problems

  • "Invalid email or password" message
    Possible typo in login or password, enabled Caps Lock or set a different keyboard layout (e.g. ENG instead of PL).

  • No email with login / password change link
    Email may be wrong in profile, message may have gone to folder Spam or Offers, and the spam filter may have blocked correspondence from the domain @sellbest.en.

  • Account blocked after several login attempts
    Security system temporarily blocked login attempts due to too many failed login attempts.

  • No 2FA (binary) code
    SMS code may be delayed (poor coverage), and the authentication app may have unsynchronized time.

  • Login page takes a very long time to load or displays error 500/503
    Service work may be in progress or there may be a problem with your browser's cookies / cache files. Sometimes a VPN or proxy connection is also to blame.

  • Message "Your email address has not been confirmed"
    Registration completed, but the activation link was not clicked or expired (after 24 h).

2. Quick step-by-step solutions

2.1 Check login details

  1. Turn off Caps Lock and make sure the keyboard works in Polish.

  2. Copy the login from a previous message from us (such as an order confirmation) and paste it into the email field to avoid typos.

2.2 Reset password

  1. On the login page, click "I don't remember my password".

  2. Enter the email address assigned to your account and click "Send link".

  3. Check your mailbox (also Spam/Offers) and find a message from no-reply@sellbest.en.

  4. Click the link within 60 min and set a new strong password (min.8 characters, upper and lower case letters, numbers, special character).

Tip: if the message does not arrive, add the domain sellbest.en to the list of trusted senders or try using an alternative address assigned to your account.

2.3 Wait the safety lock

After many unsuccessful login attempts, the account is temporarily blocked. After an hour, try again or use password reset.

2.4 Solve problems with two-factor authentication (2FA)

  1. Check phone coverage (for SMS codes) or correct device time (for TOTP application).

  2. Ask to send new code.

  3. Use one-time backup codes, saved offline while turning on 2FA.

  4. If the problem persists, contact us to temporarily disable 2FA (after identity verification).

2.5 Check your browser and connection

  • Clear cache and cookies or enable incognito mode.

  • Disable add-ons that block scripts (AdBlock, NoScript).

  • Try a different browser or device.

  • Disable VPNs / proxies that may be blocked by the security system.

  • Check for technical work. In this case, the home page should show a clear message about it.

2.6 Confirm email address

If you see a message about an unconfirmed address, click "Resend activation link" and use the new link (valid for 24 hours).

3. Customer service contact

If, despite all the steps, you are still unable to log in or suspect your account has been taken over, please contact us:

  • Hotline - Call us at +48 456 455 010 (Mon.-pt.9:00-17:00). Prepare the name, email address of the account and a brief description of the problem.

  • E-mail - write tocontact@sellbest.en (Open 24/7, we answer max. in 24 hours on working days). Include screenshots of the messages and the exact time the error occurred.

  • Contact form - go to Contact, provide your last order number (if any) and describe what happens when you try to log in.

4. Is your data safe?

  • We store passwords only in encrypted form - are not readable even to our administrators.

  • All connections are secured with the protocol HTTPS.

  • Accounts are protected by a smart system that monitors unusual activity and automatically locks out after suspicious login attempts.

  • We never ask for a password or SMS codes via email, phone or social media.

5. Best practices for the future

  • Use password manager, to create and store strong, unique passwords.

  • Enable two-factor authentication (2FA) - additional security layer effectively protects the account.

  • Regularly update your browser and operating system, to take advantage of the latest security features.

  • Do not share login information to anyone and don't save passwords in unencrypted files.

Need more help?

Contact us through any of the channels we have provided above - we are here to provide you with seamless and secure access to your account.

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