Telkom ADSL line

I cancelled my Telkom adsl line in October 2019 and have phoned in numerous times to confirm the cancelation of the line. I have even gone to my bank to put a stop order on this account and this month they took a double installment after I received a call from them stating that they will note it on their systems as well that it should be cancelled . The level of service received in this regard is totally unacceptable.