Just a warning for everyone - I had my Apple ID hacked this morning. Thankfully I was online at the time and as soon as they got in and changed the email address on the account I got an email telling me of the change. Rang up Apple immediately (an actual person answered in seconds) and they were really helpful and got me back in control of the account within 15 minutes.
I've now made the password a lot more secure, as had a simple password as I put it in so often (App Store, etc), and got two factor authentification being set up - would advise people make sure theirs is nice and secure!
Thankfully this time I got to it before they could spend anything with the card linked to my account, I'll be unlinking that and only using iTunes vouchers from now on I think.