im trying to figurout where did i got banned is there any other thing like bf4db i cant join most of the servers i dont know what to do

Battlefield Agency.

i dont know what to do the admin told me that i got banned from here idk

You are automatically banned by server plugins. If you use Battlelog you should see the ban message in the bottom. You can play on official servers for sure. And also try reaching out server admins by writing on their discord servers. You can find the link to their discord servers quite often in the server description