***** committed! Debit order from my account but no subscription.

I have cancelled my DSTV subscription at the end of February 2018. Unfortunately they still ran a debitorder against my account on the 1st of March and again the 1st of April. I have contacted them on 4 April 2018 to resolve, and they said they will cancel the debitorder and refund within 48 hours. By 9 April no refund. I phoned in again to the call centre. Again the call centre agent escalated the case and assured me there will be a refund within 48 hours. On 12 April 2018 still no refund received. I send a message in via the DSTV self-help service. No reply. This is *****! No service, but they are running debit orders of my account!