yea, you can make a credit purchase with your debit card, most cards that have a magnetic stripe.
i dont suggest you go into a bestbuy store, you should start small, go to a walmart and do a 50-100$ purchase, because the lower amount, the more chances you have for your card to go through.
if it goes through, then your next target is a 200-300$ item in a walmart or target, since they dont ask for last 4 for purchases under 300$
im talking about usa instore