1.) Go to G2A. HERE 2.) Choose any game you'd like, activate G2A Shield, and purchase. 3.) DO NOT USE THE KEY IF YOU PLAN ON PROFITING FROM IT VIA RESELLING. 4.) Go to support G2AShield Chat : https://www.g2a.com/supporthub 5.) Explain your situation that they key that you purchased is not working/is a duplicate. Simply find a used key, and if they ask for a screenshot (like they did for me), try to activate the key and screenshot the message that pops up (duplicate key). 6.) After discussing the situation for a minute or two, they will offer either a refund or replacement key. ( I RECOMMEND REFUND!) | If they choose for whatever reason to not refund/replace your item, simply go to PayPal and chargeback. They seldom respond, which (if they don't) is a guaranteed refund. 7.) Choose a site to resell the key for your money back (or increase the price for MORE than you bought it for!) I recommend Kinguin: https://www.kinguin.net/r/DaneWells 8.) Once you've recieved a refund from G2A, CHARGEBACK! 9.) Now that you have the G2A refund, simply wait until you sell your key on Kinguin. My keys usually sell insanely quick from 1-2 hours maximum. 10.) RINSE. REPEAT. PROFIT.