Telkom 3 months for fibre line still not working but being billed.

I have been a loyal Telkom customer for many years, however recently I have been having endless problems. in September 2018 I upgraded my ADSL line to fibre. the new modem was delivered in 2 days, from then on was hell, it took another 3weeks to get the fibre line installed. till today the line does not work, we can say this is going on 3 months, I have cancelled 2 numbers and my adsl and still being billed for it, I got an invoice for the router that was said to be free for an amount of 1750.00, today I get another invoice for 4500.00. But the subscription on the fibre line was around 800.00 . the service is so bad I have been calling in all almost every day to the billing and technical department and nothing, I get told a manager will call and nothing.... why is the service so bad... I am unable to work and I want to now cancel and move my fibre line to another network. it will take Telkom another 5 days to respond to this.... all my time lost talking to Telkom... and not being able to work who will pay me for this ?