Can I return an item that i bought a week ago by submitting the credit card that I used to buy it? I have lost the receipt.

Yes they can look it up through the card

I'm pretty sure you can have a credit added to the debit or charge you used originally up 30 days without receipt

Yes

Yes or you could ask for store credit

If you have a receipt, I would think so !! I personally have not tried !!!

They may only offer a gift card without receipt