Get less service from Neo Moshoeu at Cell C getmore

I've been sending Neo Moshoeu 5 emails since 13th of February. Telling him that I need him to cancel my getmore subscription. The only reaction I got was a reply from him asking me for my membership number. I told him I don't know it, and he as my supposed to be agent should be able to get it. I told him it is connected to my *** number, I mailed him 3 times after his response, the last time 28th of February, with still no response.