Debit order reversal never happened after cancellation of service

I canceled my DSTV account on 23/04/2019 and was informed that it will be disconnected on 26/04/19 and that no further debit orders will be deducted (Ref No: ********** 0-I44). Typically the service was canceled but another debit order was deducted on 26/04/2019. I then phoned the contact centre on 02/05/2019 to reverse the debit order funds, which they confirmed will be done within 7 working days (13/05/2019 (Ref: ********** 0-I47)) but are still waiting for the funds to be paid.