Three weeks and still no one from MTN can help me

I have sent e-mails to MTN two weeks almost every second day and no answer. I have contacted the call centre and no one can assist me. I have been into the MTN store in Springs town where the service was absolutely pathetic and the assistant named: Tsitsi behaved like MTN was holding her hostage to do the job. Sat in the store for almost an hour for her to say the system is not working when we could clearly see all other assistants were working. Then she sends me a email address [Email Removed] which does not work. All I want is a settlement amount from MTN, for the company I work for to pay to settle my cellphone contract. This is past overdue and I need feedback today. MTN today is the 21st April 2015 I will escalate this problem further if you don't respond today!!!