Telkom Incompetency to resolve billing problems

Since March 2018 the Telkom cable had been ****** in our area. Telkom notified us that they will not replace it. I had a smartphone ADSL line. It took me over 3 months to try to cancel it. Finally had it cancelled. Telkom was still busy billing me. When approaching there consulting agencies at George Mall, Krugersdorp MALL, Cresta centre Randburg and a few others, they were unable to help me but kept on saying that it will be done. It the meantime they were billing me on numbers attached to the smartphone in my home. When I phoned the billing department they assured me they will pass a credit against my account. The line has been down for close to a year. Please advise me what to do as I am a pensioner an unableto resolve this issue.? They decided to hand me over.