Thank you - I have checked my account both recur and auto top up are set to OFF. I checked the email I recieved and it says when this expires the same will automatically be added to your account, but I don't how or why. Cheers
The email lied! It's been reported to giffgaff several times - one day they'll get around to fixing it.
As long as you do not have recurring goodybag or auto top-up turned on nothing will happen. For extra peace of mind do not save a debit or credit card to your account.