I regret ever dealing with Telkom !!!!

I ordered a Landline for ADSL purposes from Telkom in June . Firstly the agent bungled up all my details so had to cancel and redo the contract and then ,after countless appointments not being kept to , they finally installed the line on 13 Aug 2015 also without an appointment as it was scheduled a week earlier. Since installation of the line it has not been working properly, I booked a fault on 17 Aug , and still no one has bothered to fix this problem even after numerous calls to the call centre and visits to their store. In addition to this they have sent me my first usage bill for R1500, where the contract was for R599 uncapped. the Line is running at .01Mbps and not even running at 5 % of the required speed . They also billed me for 2 calls to my own Cellphone after explaining to them that I do not even own a handset , so how can it have been me ? I have contacted the call centre , used Facebook , Twitter all in vain to get a resolution and I am so frustrated at this point !!! Please sort out my billing and please either cancel the contract or get the line working ASAP !