Telkom customer service disappoints yet again

We have had a contract with Telkom for more than 2 years now. Our monthly debit order has been and still is R806.10. 3 months ago we moved to another house and transferred the account and lines to the new house. Telkom set up everything at the new place and we received a confirmation that the line at our old place was cancelled. Last weekend however we woke up to our internet not working. Upon further investigation, they had suspended our account for being in arrears with payments totalling R3356.77. Unfortunately, the reason for this, we were told by a lady from the technical department, was due to the person assisting us with the cancellation of the old line, wasn't done correctly and we were charged for 2 lines for the past 3 months. The lady assisting us, then told us that she could not assist us any further, we would have to log a dispute online. Firstly, as Telkom suspended my internet, I did not have internet and had to buy this from another provider to be able to log my query. Secondly, I cannot understand how Telkom tells me that they made the mistake and it is due to their own error that my internet is cut off, but they cannot assist me any further.

I am once again appalled by the customer service and am waiting to see how long this will take them to sort out.