Gameflip SCAM attention!

Hello everybody! I am a new user on gameflip. After 20+ positive sales gameflip just blocked my account - I cant login and withdraw my money!! Why? Just cause of previously accounts!?? They said “Our system has matched your account with previously banned accounts, I’m sorry but there is no mistake in this” !!! On my words that I am truly first time on gamefip - no reaction or any evidence. They just banned me on website also on zendesk support site. This is ridiculous situation, I am going to police!