The fact that you can't be bothered to do research about basic hamster needs on your OWN is quite appalling. It is going to be your pet and your responsibility for the next 3-5 years, it's not PetSmart's fault that they can't cater to your every whim or that you come in looking for animals you know nothing about. Hell, you might've been speaking with a stock associate and not a petcare associate, hence the reason why they told you where it was and couldn't help you any further.

Come on now, if your fish are dying constantly, something in your brain SHOULD be going off saying "hey, maybe there's something wrong with my tank, not the fish I put in it!" Have you cycled your tank for at least 2 weeks intiially? Do you do regular water changes and feed your fish a varied diet of flakes and frozen food? Do you have a heater/filter/air pump? Are you mixing goldfish and tropical fish together? Are you heeding the directions for tank size labeled RIGHT UNDER the fish tanks at PetSmart? These are all very good reasons why your fish could be dying. You've proved that you know how to use the internet to OMGZ COMPLAIN!!! so why is it that you can't look up the basic needs of the LIVING THINGS you constantly buy over the internet as well?