It looks like your question has already been answered for the most part but going to respond just in case. Many codes have an expiration date; it's both a security issue (to keep people that make keygens from being able to eventually use a code) and it also helps to insure that stores don't sell old products when new products are available that are the same or better. Sadly, the retailer you purchased it from sold you a defective product; you'll need to talk to the retailer about getting a refund, because a replacement will not be available. You did waste your money trying to get something so old, but the retailer should be able to give you a refund since they sold you a bad product. Bungie can't help you at all, as they don't offer any form of code replacement, handing out, or exchange. Bungie doesn't sell their product to the consumer; all sales go through retailers, and those retailers are the ones charged with giving out proper working products. Destiny - The Taken King released in September 2015, more than a year ago; many DLC codes expire after a year and very few last 2, even fewer never expire.