Account Debicheck Mandate Approved - No Payment

I accepted the Debicheck mandate on the 27th Feb and to date I have not received payment. I've made numerous attempts to call, email and use online chat to no avail. The online system keeps looping saying that its awaiting confirmation even though the mandate is active on my account. By far the worst service from this company. And to make matters worse I cannot cancel the debicheck unless I make contact with a company who has gone completely ghost.