If THIS is your account, you arent banned by BF4DB.. so they can't do anything about it. The message the server gives ya also looks like an admin from the server banned ya manually (so you are not by an anticheat plugin). You need to talk with them in order to figure out why you got banned.
https://bf4db.com/forum/thread/guide-how-to-claim-your-soldier-3296
https://bf4db.com/forum/thread/guide-how-to-submit-an-appeal-2807