Charging me for cancelled account

I had a account with Telkom that was cancelled beginning of Dec 2015 (Acc ***) At the end of Dec 2015 I got billed for this again and I left it as I thought it was a cancel period that they charged me for - In the mean time I opened a new account with them (Acc *** ADSL line) - Yesterday again they took of the Debit order for the old account of R699.00 (This has now been taken twice) and then I have also been invoiced for my new account with them which is correct - Telkom owes me R699 x 2 as I have cancelled contract (***) - I want to urgently refund me that money as I am not going to pay for something that I have cancelled (the reason for canceling was that when I got the service they promised full signal, and I had almost no signal - Now they still charging me for NO Service - Come on telkom - Get it right