Paying for a cancelled product

I relocated from Johannesburg to Cape Town in January and submitted a move your line form. This was executed and Telkom closed my old line and created a new one. However they did not move my Fibre service and advised I cancel my Fibre service in Johannesburg as it was on a Vumatel package and raise a new Fibre line request in Cape Town. I did this and I now have Fibre service in Cape Town but it took 3 months to get the Johannesburg Fibre service canceled and even though Cancellation was eventually confirmed 2 months ago after numerous escalations when there was no action after the one month period they advise it took to action the request I am still being charged for it. I am still not getting any joy in getting the refund processed. If I don't pay it will affect my credit rating and paying means I pay for a canceled service. This is a bitter pill to swallow given I have been a big supporter of Telkom and have so many products with them.