yes as long as its not a gift card. if its a credit or debit then yes.
Usually you get the money back as you payed for it. Credit cards and some timed debit cards do have expiry dates, they are usually a long time away from when you receive the card.
They should give you a merchandise credit if you don't have the receipt or payment you gave them. You can always phone them up and ask or check the website and see if they have a return policy on it.
Yes, as long as you have your Proof Of Purchase (Reciept)
how coukld CREDIT CARD not be valid anymore?