CANCEL SERVICES AND DEBI STOP PRDER IMMEDIATLY

I need to get hold of someone working there as they advised me about, they services and after accepting the derbi order no one came back to me and they said they wil debit the 30 of July only to find out they debited June there was no funds luckily. I don't want their services I tried calling several times I just want them to cancel everything and cancel the derbi stop order as I went to the bank yesterday they said they are the only people that can stop it on their side. Their ref nr is SL24212 my id number ***. Please it is urgent that they cancel it immediately