Telkom billed in error - refuse to resolve query

We tried numerous times to get assistance from the Telkom Call Centre as well as accounts department to assist us with a mistake they made but with no luck. Whenever we start to ask questions the call Centre just get rude and put down the phone. <br> We initially contacted Telkom to to install a 4MPS internet line at our premises. We clearly indicated that Telkom will not be the internet provider since we use Afrihost. This first call was already a struggle since the agent was unsure of Telkom services. The installation was quick but two days after that Telkom contacted us to install another line. We explained that it has been installed and they assured us that they would cancel the order. This never happened. Telkom allocated two line numbers and billed us for both as well as billed us for the use of Telkom internet (which we do not have). We were also billed for Weekender plans etc even though we do not have a Telkom phone/ phone line. We requested accounts department to correct this and send us the correct amounts due as well as an detailed explanation of the amounts payable. Telkom now wants to suspend our service even though we are paying for the line usage and refuses to help.