Telkom Billing what a mess

SO I received a call from telkom early Jan telling me that they billed me incorrectly and added it to my account again ... when I told them that they are billing me for a 4 meg line instead of a 2 meg line and requested them to listen to the voice recordings she said that she will get back to me in 1-2 days ... haven't received any feedback from telkom. And I am not willing to pay for something I have not requested but they added it to my bill again... telkom really need to sort out there stuff as I am not pleased with the service Im receiving ... Alternatively cancel my contract and I will just pay for the line rental and use another service provider <br> they have the extra charges as installation (*** Installation 18 Jan 16 R1,147.36) on my latest bill