Battlefield 3 Constantly getting kicked by PB (someone cheated on a name I used before)

Punkbuster doesn't ban by name, it bans by GUID which is tied to your serial key. In other words, you can't get banned by Punkbuster by having someone use your name. Now Metabans (which has nothing to do with Punkbuster) might be able to ban that way, but if you want that removed you will have to take it up with Metabans themselves as EA/Dice/punkbuser has nothing to do with them.