Payments, Billing, Gift Cards & Promo Codes

I want to order something with a gift card. How do I do that?

What modes of payments are accepted?

There was a promo code in my order that I forgot to apply. Will I be able to use it later?

Are gift cards or gift certificates available for purchase?

Can I order with both a gift card and promo code?

How many gift cards can I apply to one order?

Do I have the option to combine gift cards?

How do I use a gift card that has more money than the total of my order?