Telkom - Pathetic is to nice a word

In July I had my line moved as we moved to a new house. This was supposed to be free of charge yet Telkom charged me R610 for the relocation. I've disputed this monthly since then and phoned multiple times. The one consultant was shocked that it was still open as a dispute logged in July and said she would fix it yet nothing has been resolved. My address on my bill is still incorrect as well and on top of the R610, I'm being charged interest every month. I refuse to pay it. I have no idea how to resolve this because clearly Telkom is not doing anything about it. Once my contract period is over, I am definitely cancelling my contract.