DSTV Contract Cancellation NIGHTMARE

I contacted Multichoice/DSTV on 10 May to cancel my contract. My signal stopped on 24 May. On 25 May I had a debit order for DSTV go off my account. I queried this and was told I will be refunded in 7 to 14 days - I objected as they should have cancelled the debit order - why must I wait a week or two for money they took out of my account for a service they no longer provide. THEN I get an SMS : DStv, Thank for choosing debit order. your payment date is 25/6. WHAT ARE THEY DOING. 1. They deduct a debit order for an account that has been cancelled, 2. They then instead of reversing it and cancelling the debit order create ANOTHER debit order!! I have been communicated with what I can only assume is a bot on their facebook page which just keeps on asking my account details. Calling their line obviously only worsens the matter. What to do - must I go stand in the DSTV/Multichoice queue or lay a ******** complaint?