Refusal to cancel service

I called Dstv to cancel my account and they have been giving me story after story. First they claimed that I was still paying off my explora contract (which I finished paying off 2 years ago). Then they said they can’t do it I have to send an email. Then this then that. I still see a pending debit order from them and they are not saying anything, just that they’ll get back to me in due course!!! I highly advise against the explora contract people! In fact never make the mistake of switching to debit order never!