*****!!! Day light ******* MTN SA

MTN SA has debited my account with an amount 3 times as much as what had been confirmed telephonically for my month to month router. Prior to receiving my device I had to make an online payment of R547. Meaning I have now paid a total of R2000 some odd rand for what was supposed to have been R499. Four times as much as what I was meant to pay for only have the device for 1 month. This payment had not even been allocated to my account. I spoke to 3 MTN "Customer service Champions" one of which is a Team Leader who refused to escalate the matter or give me a detailed reason as to why these money's were being deducted. I need answers MTN.