In the future if someone is TKing/TWing you, please report it to an admin. If there is no admin around, or they do not see your message take a screenshot and make a ban request. Teamkilling in self defense just shows up as a teamkill to us, and it is very easy to see two teamkills pop up one after the other and assume you are simply TKing.
Also, teamkilling is not allowed, no matter the reason.
Unbanned, should be able to rejoin within the hour.