Overcharged and account not right

Telkom again. This is my 4th email in 2 months. I eventually cancelled my adsl account with Telkom due to lack of service delivery as promised. I have now moved to Afrihost. Unfortunately I have to still rent the line from Telkom. Last month they charged me R600, which was the full cost of the ADSL package which had been cancelled in February, I called and was told I would be credited minus the line rental. Now they are charging me R265-00 a month for line rental only. I was quoted R189-00 on the phone. And they have still not credited my account with the R600 !!!! If I log in to Telkoms website and check my account. It shows I have 3 landlines all with the same number ... What the hell ???? What does one do now ??? Telkom promises and promises and never do anything they promise. Everyone always tells me \You are dealing with me now and I assure you I will make sure this is sorted\" Then nothing happens !!!! "