MTN still has not re-conected me after a month

I have been waiting more than a month to get my phone re-connected. Everyday when I speak to someone..they put the 1 phone on. Then the next day I get a message to say my account is in arrears. This has been going on for MORE than 30 days. Surely MTN is now in breach of contract....? My accounts was paid in FULL on the 13th and 16th of July. Today is the 21st.......still no joy. Speaking to supervisors does not help. What do I do......honestly......how hard is it to allocate Rands to the correct account....? Incompetant people. I want to end my contract. They are now in breech of our contract. I believe I have the right to end this.....as they ended mine when my payment was behind. Does anyone know how I can contact that has a higher position as supervisor