I was banned about a year ago on an account for Aimbot, so i bought a new account and hadn't ever hacked on the new one. I don't know why for some reason my ban just recently "linked" from my old account name to my new account. PunkBuster Server: VIOLATION (AIMBOT) #59144: Dkilluh (slot #8) Violation (AIMBOT) #59144. This is the message I got, but this is my old account, and i am playing on my new account. Note the PB ban is also just on this server, and not reinforced on other servers. 

https://bf4db.com/forum/thread/admin-request-how-to-appeal-your-ban-56

Read this and create an appeal according to the guidelines.