Another "fair" Coin distribution ban

Three days ago I've reciveid email that EA banned me for Coin distribution. I spent nearly 1000 USD on promo packs and value of my UT squad is approximately 4000k UT coins. At the moment of reciveing email I was offline for more than 6 hours and my last actions online were reselling TOTW Valverde (on that moment it worthed more than million coins) and some other not big valued rare players. As i read Answer HQ topics such sh*t happens not so rarely and actually damages players who got much coins by trading. The most interested in game players falsely banned. I understand that everyone here is "falsely banned", understand that trading may be recognized by system as suspicious activity binded with Coin distribution. But I cant understand why I got acoount banned immidiately (I didnt get any warnings or transfer market restrictions) and for which operation exactly? I disputed it twice: 1st time may case even wasnt registered, 2nd time I got declined by typical letter "We did all investigations and we are right". I disputed again and asked for DSAR because whant to see all clear.
If anyone had same problem and could solve it please tell what did you do. Or if anyone has any advices will be appriciated. I just want to continue playing on my account especially after spending such amount of time and money.
This post is another prove that EA doest care about you at all. They created broken system that makes false decision more in half of situations. Still the real Coins distributors have been working for years without bans. They even buy advertisement from EA FC streamers and noone cares. But if regular player sold expensive card that is very suspicious, need ban him asap.