Telkom is pathetic

My ADSL line and WiFi has been out of order since December 2017. I have logged numerous faults, put in leave at work for technicians to come to my house to fix the problem - with the technicians just never arriving for the appointments. I have submitted all the necessary documents to terminate the service on 2 different occasions, which Telkom has refused to process. Telkom keeps on billing me, when there is no service, and no consumption / usage showing on their own invoices. The call centre staff sound bored / asleep when you phone to log queries, and is utterly unhelpful and in desperate need of training. Telkom is a most frustrating and inept company to deal with.