Telkom worst service ,ever

I moved 1 July 2019 in to my new premises advising Telkom to cancel my ADSL service on my previous property and install a Fiber line into the new property as only Fiber was available . Trusting the ADSL since has been cancelled since the new Fiber line was installed on my new property and received confirmation that the ADSL line has been cancelled , everything was going well .I received a bill of R6500, 6 months later on my previous address line .Just to find out that when they connected the Fiber line the reconnected the old address with the same Fiber service aswell and I was being double billed ,After another 4 months of trying to resolve this I am still with a still with a bill of R2500 which I am not liable for.They have listed me on Trans-union and Experian for not paying a bill that I am not suppose to be paying ,because I am paying for the current service at my new address . I have intentionally not included ref numbers or my address .Terrible Terrible service