Unauthorised Debit order

A company called Phone box is deducting money from my account each month for a service that I did not subscribe for! Trying to locate them and cancelling the service is a nightmare. I don't even know where they got my banking details from. <br> <br> Can someone please assist?<br> Please refund my money, you are *****ing from me.<br> I did not authorise any debit order. Come with proof if you want to fight this.