I get a message when i try to join some servers not on any Server.

Is there an issue from the server or my side?

https://prnt.sc/kK9-mLvacxKu

you were banned because of server Crashing

https://battlefield.agency/player/3fc66b02-56e5-45e0-998b-9c16aba75096

So i have to contact them via Discord right?

Thanks for your reply btw.

Yes   https://discord.com/invite/jPWs6tU