If you buy an injured fish, and you know its injured,.... but buy it anyway...
Then get it home and it succumbs to a fungal infection(which is secondary to the injury AND preventable)
Thens its your fault... should have never bought the injured ray...
This is not a flesh eating fungal infection though.... That doesn't even exist. Not in the terms they are being put out to you anyway. ANY fungus is SECONDARY. Fungus is not like a virus, or parasite, looking for a host. Anything fungal is secondary.
Matts fish didnt die from a flesh eating fungal infection..... unless every fish he purchased was injured in some way.... then once home, they were in bad enough conditions for the fungal infection to set in....
If this is the case with all of this stores fish.... then im leaning towards bacterial... or even some sort of parasite.... either way, you'll want to get your facts straight befor making any calls to them, or accusing them of this sorta thing... never know, you might end up talking to somone there that knows what they are talking about, and you may end up looking silly.