Incorrect Billing and lies fed to me by telkom staff

Last year November we moved house, i contacted telkom to have 4mbps ADSL line moved and they sent two Technicians from open serve to do the line move for us. They moved the line In November last year BUT as per the two Tech who was at the premises, The 4mbps line is not stable as I am to far from the exchange and they can only provide me with a 2mbps line. Because i need this line to work from home i told them its okay and that i needed to contact telkom and log a dispute that my billing be changed and i did that in the same month of November. We has a storm and the line was off and another open serve tech came to sort it and we had a very interesting discussion as he was far friendlier and knew more than the previous two techs who moved my line. 3 Houses down the road from me another Telkom customer is running this 4mbps line i cannot have and thats not stable. Yet we running on the same line to the exchange. Now ive been logging faults and disputes with telkom to have my billing sorted to no avail. Ive been billed since the move last year November for a 4mbps line where im currently running 2mbps line. I was at mall of africa today and tried to log a dispute and was told by an agent there that i cannot log a dispute until a fult is logged and tech came out and sorted out the line to be put back on 4mbps. I have been trying to speak to your facebook team who advises me differently, I do not know who to approach and who to speak to anymore but one thing im sure and *** positive about is that im not paying another cent on this account until the relevant people contacts me and helps me get my billing sorted from last year November to date and have my 4mbps line restored. Below ia your latest ref number ********** 5