Vodacom made me pay to the wrong account

I went to pay manually at Vodacom Victorian centre in Heidelberg and the cashier who assisted me did not ask for ID but just presented the speedpoint for me to pay.

I went back a few days later because the payment was not reflecting on my vodacom account only to be told that the payment was made to the wrong account. They advised that they were going to escalate the 'issue' to the payments and i got an sms with the refference number and i was told to expect a call from Vodacom.

It has been 2 months and the issue has not been resolved, Vodacom at Victorian shopping centre is refusing to refund me my money. I honestly don't know how i'm supposed to survive a 3 year contract with a service provider that does not care?