Daylight *******

We signed up or registered for Fibre from Afrihost. I received an email informing me that our order was placed, however, the same day We changed our minds about going forward with Afrihost and I sent an email canceling the Fibre. They responded with an email giving me steps to cancel the order. The next day I received an email to confirm a debit order. They probably sent four of these emails which I did not respond to. There's no number to contact this company because I preferred to talk to someone. We followed the steps to cancel the order, they sent another email acknowledging the cancelation but now I have received another email saying that I must pay R954 or else my service will be suspended. We didn't even enjoy any service from Afrihost but they expect us to pay them. This is daylight *******. What can I do to get these people to stop trying to debit my account because I never confirmed or opened any email regarding the debit order verification. Please help me