TELKOM NIGHTMARE

I have requested cancellation of my fixed line in March with effect end April 2018. To date 2 debit orders have been deducted and I have phoned and e-mailed with no success. This is most annoying and the worst service I have ever had. Taking people's money.....I am going to have my debit order return to my bank as I am refusing to pay for a service I have cancelled in time and due to no service or pride in their work and lack of responsibility from Telkom side....why do I have to pay for this.