Over charged by 6 months, refusing to credit me

Telkom charged me for 6 months of phone line and ADSL rental from March 2014 even though my service was only installed on the 18th of September. I logged numerous queries in this regard and they disconnected my service 3 times and charged me to reconnect even though it was their mistake. After months of disputing someone finally sent me a reference number ***5 and said Telkom will refund the changed amount but nothing about the reconnection fees I had to pay. Now after all the arguing and disputes I received a invoice again with the wrong amount. My first experience was great but after only one month all the predictions and bad mouthing I have come to ignore came true and now I seem to shout against a bureaucratic wall of hour long calls waiting for someone to pick up at accounts to be connected to *********** representatives who doesn't log the dispute and basically wastes hours of my time or the alternative of driving to a Telkom store and standing in line behind 10 people also for 2 hour or more and the account still cant be sorted. The accounts rep told me in a second what was wrong , its that obvious but nothing has been done to sort this issue.