When a ban is placed on an account, it is in violation of the EULA and will likely not be overturned.
The most common bans placed on the account are listed below;
- Use of unauthorized 3rd party software
- Account Refunds
- Fraudulent purchases
If you feel you did not use any exploits or third party software, the account was likely closed due to being refunded or fraud.
You will be referred to this article if a ban was placed on an account for any of these reasons.
There will be no further recourse for any of these account bans.