us direct express comerica bank ripped me off for $765 nationwide

US direct express made error along with ssi on my address, i had went to ssi to order a separate direct express card for another person that i was their payee representative of. Due to the mix up with address, the new card was sent to an old address. The current card I held was stolen n reported stolen along with my ID. Direct express decided to just ignore  that the other card was stolen n put the ssi monies of another recepent onto the stolen card of a different receipent. I disputed and they denied my claim, so I appealed it with new information including a police report. They still denied the claim. Now they say its not their problem, and that I am to contact social security. Social security says its us direct express who needs to deal with it. So my recepient has lost over $700 and no one will stand up and make this right. This is not fair and certainly not legal.