Cancelations department

Its been 3 months of phoning MTN every time to follow up on them to see if they have finally changed a number of mine to pay as you go, each and every time they tell me that they will phone me back to complete the procedure and then they don't. I have been a loyal customer from the first time I got a phone. I am currently on hold and waiting for the cancelations department to answer my call, it has been 30 min of waiting. Honestly don't know how long MTN is going to take before following through. It is very disappointing, but boy are you quick to let us know if we have amounts outstanding or switching off the service