so G2A reponded to my paypal dispute saying "Greetings, The Seller is the official Steam vendor and he confirmed that the key was used after the purchase. In such situation refund is not possible as you've already activated it on your account. Please close the dispute. Kind Regards G2A Team" it was for a 50 dollar steam card, i have a screen shot of it saying it is an invalid code. what do i do kinda need help.