Ban for no reason and no one answer me they just close the case

Ban for no reason , and no one answer me , they just close the case.

Ban: Football Soccer

You broke our rules against Cheating. 

( i not broke any role )

I am banned on my account since 2016 and believe this is a mistake as I have never abused the policy and have spent money on FC points over the years. I want my account unlocked. I don't remember to do something that is against the policy, why i should do that when i play on this account for years and i spent for than 10k$ on this game? Can someone help me and unlock it? If i did something wrong and i not know just tell me what i did and unlock the account , so i know to not do the same on the future? If account is not unlocked i will not play ever this game , because i don't want to create another account and start from the beginning , i have this account more than 10 years.