Looks like MTN doesnt need anymore new contracts

I have been trying to purchase an add on data contract for over a month now. What has happened to MTN customer service?? I have been with MTN for 12 years and have never experienced problems like this before. No-one seems to know what is going on - I am given number after number to call and each number has worse response than the previous one. MTN has all my details - all i want is an additional data contract. I am SOOOOOO disgusted by their supposed customer service. I think Ill have to give Vodacom a try. I have 2 emails with diff reference numbers saying contract has been approved - but MTN has no knowledge of either of them??? Why issue a reference number if it has no meaning and has not been logged anywhere.