Zavvi are pretty good at returning thing if you keep on top of them, let them do it at their own pace and you will run into problems.
Will you have to return for refund or will they give it to you with discount?
It depends which courier, the courier Amazon uk used are the worst. My copy was packed very well and even then it had massive damage to the box, see here:
http://collectorsedition.org/forums/...amaged&page=10