mtn useless

I can never reach a call centre. Nobody seems to want to work any more. Everytime I phone customer care I get cutt of. The self help service does not work and to make matters even worse. I was using my data yesterday as. I have some that would of expired. I used the data balance option to make sure. I would not use more than I have available. But. Mtn sent me a sms today informing me that I have exeeded. My 1800 plus rands. Limit. So now I have a massive bill. And I had the data available. They rob people. My services are now suspended. And I cannot reach a call centre. I am taking a 200 km drive tomorrow to head office all the way from mpumalanga to head office. And they must explain how this works I also never have reception where as I used to have and now I have to drive 20 kms just to send a email. They are utterly useless you pay every month for a data contract and when you use it you apparently still have to pay out of bundle rates I want a explanation. If anyone from Mtn reads this please give me a call.