Lost Access To Auction House.

Hello, I am not sure if anyone is going to see this, but I recently was playing madden ultimate team and I was selling cards as one would do. I got off the game for a few hours and I come back to see that I have been banned from the auction house for distributing coins. I have never done any of that in my whole time playing any Madden and I have always followed the rules and terms and conditions of the game. I am really disappointed in this considering the amount of time, effort, and money that I had put into games for the past 6 years.