Billing problems not being solved

I have had a mountain of administrative problems with Telkom this year. 1 I tried to transfer my service when I moved house. Was told I could do a transfer but it later became apparent that it was not possible as I had moved to another exchange area. Being without a line for a period of time I was told the service had been cancelled (was just more than halfway through a contract) and that I had a credit balance. 2 I app**** for a Telkom fibre line to my home which was installed and thankfully works most of the time. However, the billing has gone crazy. I am now being charged for the old contract (which was supposedly cancelled) as well as the fibre. I have tried on several occasions to get this rectified but to no avail. I regret the Telkom Fibre contract. There are so many other service providers out there now I wish I had waited but am now tied in to a Telkom contract for just under another 2 years.