[Kymmy]

First thing you do is ring up your bank and cancel the direct debit and play merry hell with them as this was not authorised by yourself.. Also ask for them to claim back all payments made under that direct debit.

Then personally I'd call the police (local number and not the 999 number) and report it to them as that will then give you a crime number which will help you in the future regarding this matter (i.e.. credit rating..etc..) also call virgin reporting to them that someone has used your details without permission quoting to them the crime number