My advise is to contact Gameflip Support in link below. We normal buyers/sellers will not know what exactly happened nor can we help you find out what actually happened. Support can help you with that.
https://gameflip.zendesk.com/hc/en-us/requests/new
Provide all Information. They will ask for more information if required.
Just a few questions that might help
- Did you ask the user to rate before sending code?
- Did you ask the user to rate right after sending code?
- How did you know that the person who claimed your code wasn’t working was the person that got your account banned? Because you can only see the reason of not being to log in.
- The codes you sell, are they auto delivery or 1-3 days delivery time?
Old case that might be relevant - Suspended for asking users to rate before receiving item?
If neither question 1 and 2 applies to you, just submit a request to Support. All the Best!
Regards,
Sparkling.