No feedback after ********** upgrade of contract and still deducting amount from me

more than 2 months ago, one of my accounts was **********ly updated. I reported it immediately. At month end the full new contract price was deducted from my account. I called again and they said the last person I dealt with didn't escalate it properly so I needed to send an affadavit to the ***** department which I did. Then there were specific documents I needed to sign which I did. At month end the amount was deducted again. Have subsequently sent messages but no reply. It has now been over 2 months and still have heard nothing from Vodacom and my account is still showing the ********** contract. I bet if I didn't pay my bill someone would be onto me like a flash but now I am over R3000 out of pocket and nothing. I think I will be taking my 5 vodacom contracts elsewhere.