My account was banned or suspended

My Gameflip account was banned due to “conducting business outside of Gameflip” although I never sold anything outside of Gameflip, everything I posted on Gameflip sold on Gameflip. Never received a warning just tried to sign in one day and the account was banned. I had roughly $30 on my account and would like to move it to a new account or my bank account. I created my account using Facebook so I’m not sure what the username is or password but I can still sign into that Facebook as proof. My other Gameflip account that I use was also suspended because it was considered an “alt” account. I can’t access my invite code because it won’t let me sign in , is there a way to see it without signing in? Please help.

Please delete this post moderators