I have no idea how to prove my innocence.

I was banned after getting one kill and then being eliminated in a ranked match. EA's official personal data flagged it as a "competitive advantage," but I can't see any advantage at all. I suspect my account may have been hacked because the IP address shown in the official data had changed. I immediately contacted customer support and changed my password. However, when I submitted an appeal email with the EA official data attached, I still couldn't prove my innocence. I didn't exploit any bugs or insult anyone. My performance the day before was quite average, but I'm not sure if it's because I performed poorly in the match, scoring only 300-500, that I was labeled as having an advantage. This is ridiculous.