Cheat

They protecting own profit by banning transfer market but not care at all for fair play, if they ban hackers who cheat to get coins and sell through the transfer market they wouldn't have a issue with market

Same thing happened to me a few times now, got clips of it too. Unfortunately EA does not seem to care enough to even try to fix it.
So many false promises before the game got release, talking about doing something about the hackers etc.
It's worse than it has ever been, including coin transfers/sellers that don't get banned for blatantly obvious things, they rather ban legit traders that spend countless hours.

You know what's even better?
They managed to mass ban legit traders on pc now because they can't figure out how to autoban people that transfer/sell coins.
Same thing apparently happened on Playstation on Christmas Day too and got fixed without about 24 hours.
They haven't done anything about the mass ban on PC in about a week now.
Hackers can still play, most coin sellers probably too. But me and many others that spent countless hours trading and bidding on cards get screwed.
Absolute insanity.

I play on pc but yesterday I met opponents and my controller wasn’t responding in game but works every where else. Had to quit the game. 

Mod unresponsive