Double debited since phone upgrade. Rude staff

Hello.<br> <br> Since I upgraded my cell phone in August, my bill has doubled and tripled in size (since September debit). After phoning 808 probably in excess of 30 times to report this and request invoices, I reached unhelpful consultant after unhelpful consultant and never got anything that I needed. My bill that used to be +-1100 was R3096 in December. I refused to pay it as no one could tell me why it was so high. (My invoice for December, as I was told yesterday over the phone, comes to an amount of R1700 - which I still don't agree with but its still half of what they're trying to debit). Here's the kicker, I deactivated my credit facility and set it to zero.<br> <br> Until these double debits are resolved I refuse to pay any more money to mtn. Especially since there is no service received as my cell service has been suspended for over a week now. <br> <br> It really makes me so angry that MTNs total lack of compassion and inability to assist its clients has made me resort to such lengths to try and get their attention.<br> <br> Please urgently assist me as I am now out of options. <br>