Telkom *****ING Money

I Cancelled my Line Rental with Telkom. Cancellation was effective 12 March 2019 (Confirmed by Telkom) Order backdated to 4 February 2019 (Confirmed by Telkom) They advised that the billing process might take 2 months to conclude. I received yet another invoice today for the month of June... 4 Months Later. At this point Telkom is doing nothing else but *****ING my money!!!!!!