Mistakenly approved debit orders that can't be stopped or deleted

I feel it's useless to try and send them emails as they never respond. Their telephone no it's wro g it goes to a total different company, they are not traceable when you have a problem. I'm really frustrated as I mentioned that I ve got 5debit orders of which I got mo ey for one. Those other 4 can't be canceled its only them who can do that but still they not responding. I don't advise other people to use that company. WHY CAN'T THEY BE FOUND ON THE PHONE???? Frustrated client..... **** telephone no.