Unbelievably bad service

I have a 3G SIM card for my iPad. This last month I did not receive an account so on the due date I paid the usual amount. So what happens? I get suspended. Why? Because I did not pay the amount on the invoice which I did not receive! So I phoned (a mission in itself), eventually got through and managed to get reconnected. A week later I'm again suspended, but by now I have received an account to discover that I still owe an amount because I exceeded my 2 gigs. I pay the outstanding amount online. So I try phoning again and after several unsuccessful attempts I decide it would be quicker to go to an Mtn store in Sandton City. And lo and behold they cannot connect me online and they now also have to try phoning and I eventually left after the consultant herself made several unsuccessful attempts to get through to her own company. And she was not in the slightest perturbed by my very legitimate frustrations, just couldn't care less.wasted two hours of my time on the road and who knows how much was spent on fruitless phone calls. PLEASE I WANT OUT! Vodacom is cheaper and I do not want anything to do with mtn.