No Services for 3 weeks, yet billed

On the 28th March I upgrade two contracts , since then I have been back to MTN 4 times, and the services have yet been activated, Including a average holding time on 808 for up to 3 hours, the last time which was Sat the 11th April the system shows my sim cards are deactivated and I held on for 5 hours listening to a recorded message. Havent been able to use any phone since 28th March, no service , no one contacts you back, and the general attitude is take your sim out and put it back in again. Or sorry call centres fault. <br> <br> Where is the MTN Service Manager ? or do I now withhold payments and sue MTN back for theft and false advertising. <br> <br>