I purchased steam cards for someone as a gift and when they put the code in it said the...

I purchased steam cards for someone as a gift and when they put the code in it said they have already been redeemed. No one has touch the cards but the two of us. So if they have been redeemed I would like to know how and who redeemed them. Because I'm not understanding how this can happen. It's *** dollars total. Here are the card numbers and pins. Card ** ******************* *F*WB-P***H-VQAG**CARD ** ********************LLJFP-PEPGX-*CENA*CARD ** ********************AG**I-NTCQ*-W**DR*CARD ** *********************T*GKZ-E*B**-*HGDH*If this isn't enough information let me know because I'm going to pass this on to the proper authorities. I screenshot everything I do online just to inform you ok. Your help will be very helpful in this issuse. Thank You