Bad quality

I would like to complaint about the fish I bought the twice.<br> <br> I bought fish there and every time they don't last 2 days and die I cant be because I am doing something wrong because I bought also at another pets shop and that fish are still going for 8 months know and they are in the same fish bowl and the pets shop. What make angry is that the complaint pet shop is double the price as the other pets and paying so must for something that last two day is not worth is. I bought a fish at complaint pet shop on Sunday 02/05/2015 and it already die yesterday 05/05/2015 and the other fish I bought at the other pet shop is still going.<br> <br> How is this happening?????