Bad Service

I upgraded my contract on Monday through MTN Direct, the sales person told me the request would be submitted and he will let me know if I was successful and also discuss the T's and C's, I got an sms to say that my application was successful and 5 min there after my BIS turned off and my signal went to gsm. I could still make phone calls and send sms's but could not access any internet services.<br> <br> I tried phoning customer care to speak to consultants many times but my calls just got dropped after holding on several minutes, I sent emails etc but could not solve my problem yet.<br> <br> I then went on to my on line account at MTN to find my unbilled balance showed 300mb service fees etc that I did not agree to or buy, my agreed package was for R369 p/m, my unbilled balance is over R600 and I can not query it because there is no response.