How to get your Fortnite account back after being banned on PSN?

Hello explained very quickly and I lost my account (PLAYSTATION NETWORK) a year ago. At the very beginning, when I made an account, I entered that I was a teenager. On Fortnite I spent more than 600 euro on my father's credit card (I always asked him). After about 5 months I got the news that I'm a teenager and the PSN had banned me. Now when I try to go in on the PS4 I get an error message that you have banned me. Now the question and I think I only lost my PSN account and not my Fortnite account. What should I do to get my account back (Fortnite account NOT PS ACCOUNT).

No idea, hopefully nobody will play the trash any more soon. Also, yes you can get it back, you weren't banned from the game spiel

Then I spent more than 600 euro on Fortnite using my father's credit card

That can't be put into words.

Be that as it may, if your Epic account has not been blocked you can still log in to it, but since it is linked to the PSN network, access to it should also be blocked.

You can try to create a new PSN account and use your Epic account (Fortnite account) on it, but I'm currently not aware of any other way.

Epic support might be able to help.