mtn 808 & 800 they never answer

I have tried to call MTNs' call centre number 800 for 2 months now. My account has gone from an average of R700 to now R2000 and this is for data usage. I want to find out why and how can I bring this cost down. Alas. <br> <br> I call the number, go through the electronic prompts, trying to get to a person in Company Accounts and nothing. The call is either drops or I listen to music and adverts for hours. <br> <br> All I want to do is get an answer from MTN! Is it possible or do they now want to talk to customers that have been with them faithfully for 16 years? <br> <br> Please MTN Company accounts answer my plea?