No feedback on double debit query

No really sure how to deal with this useless company. Website failed when i was signing up so I received 2 debit setup notices. Does this mean I'm going to be double debitted? who knows.... no one can tell me. Called and got redirected because everyone is of no help. Sent a mail, and they just planly ignore it. What is my next move? Other than the expense of being double debitted and then the cost of a reversal....great... (sarcasm btw) It is for ref PF ********** btw... logged a week ago.