Billed 3 times than agreed upon,

Took out a data Contract with MTN for R170 a month But they are billing me 3 times that amount around R500, sent an email to *** which their responded to say the issue has been fixed and they have credited me back the money they from the previous debits as per ref : ***. however they are still charging me the same amount which is 3 times the one agreed upon.

I have called the customer centre for them to change the contract, even went as far to ask them to pull the call when i took out the contract but the agents say they cant help me all i have to do is pay up or my line remains suspended which means i cannot make or receive calls or use data which they continue to bill me for.

spoke to Nomthandazo call ref : *** - She refused to transfer my call to a supervisor or manager, could not provide copy of the call or contract as she was not there when i took out a contract

This is the worst service delivery !!! Mind you i've had this number back from 2009/8 and this is my 3rd or 4th contract but the service i am getting is terrible....