Deleted coins

Hello,

Yesterday my coins deleted (around 600k)

They said:

We have confirmed that your account was involved in Ultimate Team™ Coin distribution. Coin distribution is against our rules. Because of this, we will not restore the deleted content to your EA SPORTS FC™ Account.

I did over 500 matches, and bought cheap kits and badges, quick or normal sold it.

I made all my coins by working hard over time.

i did not sell, buy or distributed coins.

My most valuable (tradable) player 87 dembele ( I bough it for 58k) 

I bought 88 by mistake and sold it with about same price.

I also bought 86 because finding 87 was hard, but when I found 87 I sold 86.

What did I do wrong?

If i bought coins I would buy couple millions.

All YouTubers advertise coin sales sites

Case #200748482

Please help. Thanks in advence.