Bad Service/No response

After an *********** salesman at Summer Mobile messed up my contract and not having my problem fully resolved,Ive contacted mtn numerous times by phone and email with detailed discription of my problem and I dont get any response. Ive only ever used mtn and this is the first time Ive received bad service. Its been more than a month and my account has still not been sorted out and i still have no internet.I really dont know what more to do!!!