So I bought some beats ep and after a week the stoped working the wire got cut some how and I wondering if I could return them

You will have to go to the store and speak with someone at the customer service desk and definitely make sure you have your receipt

So on the gift card is it how much the product was

Usually they will do returns without a problem. But will give you a gift card if you don't have the receipt

Well what they usually do is give you a gift card if You don't have a receipt but if the code matches up at their store than you can exchange it for a different one