If your Shopee link is banned and you have forgotten your username, you can try the following steps to retrieve your username:

1. Visit the Shopee official website or application and click to log in.

2. On the login page, select the "Forgot Username" option.

3. You will be asked to provide the registered email address or mobile number associated with your Shopee account.

4. Enter your email address or mobile number and follow the instructions to proceed to the next step.

5. You may need to provide additional verification information, such as the name, ID number, etc. used when registering.

6. After completing the verification, the system will send you a message containing your username via email or SMS. If you are unable to retrieve your username through the above steps, it is recommended that you contact Shopee's customer support team, provide your registration information and details, and seek further help and guidance from them.