Fortnite Banned for no reason.

I'd contact epic games support (don't bring up the cracking accounts that won't get you very far.)

My idea is that if you logged into some of those cracked accounts your IP address could've been logged on them. Then someone else (or the person who owned the account) could've cheated and you could've been impacted as well. Your best chance is to say that people have been targeting you and spoofing your IP address or whatever.