WORST SERVICE EVER, I FEEL SO HELPLESS

For the last 3 months my line has been off and i'm still being billed each month!, 3 months ago I moved to a new home, before moving I called Telkom to inform them about the move, after that they have switched off my line but it has never been installed to my new residential address, I am still being billed each month for a line that is off! I call in every time to follow up on my queries to dispute the amounts but nothing is being attended to, every time I call in the agents advise me that they will put on high priority at the accounts department but still not feedback! I feel so helpless, I have been sitting without any Internet for the last few months. This is such an inconvenience as I am a working person that needs internet almost 24/7 and buying data is costing me a lot of money. I feel very helpless! This is the WORST service that I have ever received! and NOTHING is being done about it!!!!