Telkom Poor service

I resigned from my Telkom fibre account after 2 years as I moved house. At the time I was on a month-to-month contract. All of a sudden I was charged with a claw-back fee and installation fee for a router (new one, due to earlier upgrade) I never got. I had my original router since day one, over 2 years which I complaint about to Telkom many times but they never had stock, but when I resigned the cost was added. Now they handed me over to Debt-new and these guys just want fees phoning me non-stop but nobody care to fix bill.