Returns question.

Can I return an item and pay the difference to exchange for a higher price item? And if I do this, can I keep an item I got for free as the deal of the week when I made the original purchase? I understand that if I was returning an item for a refund of need to return the free item as well, obviously.

I have no idea, it's probably best to ask livechat as you will get an answer straight away :)