(adsbygoogle = window.adsbygoogle || []).push({}); Title says it all. Is there any possible way to unban an account that has been banned by sony?

Unfortunatly no.
The only way would be to call them and trick them into unbanning you , very few cases of people who pulled it off , its nearly impossible.

Oh okay, thanks for answering. Is there a reason why it cant be unbanned?

Yes, the reason is because you agreed the terms of use & you broke a rule.
For example hacking it's against their rules