Telkom cancellation Issue

I have requested my Telkom contract 01/10/2019 Dispute Ref ***0, again on 10/12/2019 Dispute Ref ***3. I received and email that my contract was only canceled on the 06/02/2020 and last payment was supposed to be in February. I have in the meantime stopped the payment at the bank for the Feb payment as may account was debited in Nov/Dec/Jan and the was charged a payment rejection fee of R202.70 and was advised that I currently have an outstanding balance which will be debited on the 30th April 2020. Why was cancelled only on the 06/02/2020 and not 01/10/2020 when the cancellation was requested? I would say Telkom owes me a refund instead of me having an outstanding balance.