Telkom is useless

Telkom have the worst services of any company I did business with. First I ask for a 10mb ADSL line earlier this year. It took them 3 weeks just to come back to me. Then when I moved to a new home later in the year, I asked them to move the line by the end of the month because I still need internet for work. They immediately moved my ADSL line to the new home. It took them another 2 weeks for them to install the new ADSL line, On top of that I only received 2mb line, because the order was never closed, I called them over and over again then they upgrade it to 4 mb line. The best of all it I still got charged for 2 months 10mb line even though I have a 4mb line. They refund me 1 month. So I decided to stop all my services with telkom. They cancelled that very quick, but what they did not cancel and it is still not cancelled is my debit order. I gave my 2 months notice, I even did a dispute that my debit order is not cancelled. They said it take 14 days I called them on the 15, 16 and 17 day and all I get was "sorry sir it is still in progress" now it is 3 weeks later and guess what, there goes the debit order again.