MTN

I have been trying for 5 days now to cancel a number, and to upgrade my contract...spent in total about 12 hours on the phone....NO ONE is answering the phone at retensions/cancellations....terrible terrible service....then i tried to maybe go ahead and do my upgrade....nope, my cancellation on the other line must first be done...really??????? does MTN not want my business anymore after so many years? Please contact me on ***