G....rep......
I know nothing about the situation except for what is posted on this thread.
My take on the situation is that the fish probably cost your shop $5-9 and that there really is no reason not to work with the owner. A 24hr guarantee is kinda a joke I must say and correct, its impossible to know why the fish died. Was it from a psycho clown fish, bad water, improper acclimation, sick fish and the list goes on..... Who knows.
Even telling the owner of the dead fish..... our guarantee is 24hrs however ..... you are a good customer and are several days past this warranty period..... I can't give you your money back or give you a free fish but we can sell you another fish for 1/2 off......