Very disappointed customer.

I have been trying to sort out my problem for 6 weeks now. Customer care is useless, I have been given reference number after reference number. No answer. I have sent several emails. Waited days for an answer, now they say my employee discount has been removed and I must supply a letterhead that I still work for the company. Really? I have never been asked this. Without any prior notification, my monthly amount was just increased. And why now, a year and half into my 3 year contract. I pay my subscription every month, I think its only fair to say that MTN should also live up to their end of the contract as well. this contract was offered to me at the time of my upgrade, so that amount is how much I am to pay for the full 3 years.