EXTREMELY POOR SERVICE

I have been struggling with telkom for almost 4 months I was offerd the opportunity to work from home so I needed internet I apply for the ADSL package with a 10mps line speed when I began working I notice my line speed wasn't fast enough so I increase my line speed to 20mps with a extra cost off R200 they said it will take 24 hours to update when I called again they said it takes 5 to 7 days. I waited again when I did try after the time frame it still was not working fast enough with my new line speed so I logged another call when the telkom people came they advise the router telkom provided was not correct and I should go to the store and change it after much fighting with the Telkom representatives they eventually changed it when I when home the internet is still not working I tried calling the call center they just disconnected my call everytime the service is very **** up at telkom I wish to cancel my service the service is extremely poor because now I need to pay for a bill I do not use