Tell the pet store people that she is an irresponsible fish keeper. The first betta jumped out of the tank because there was no lid, then tell them there is no heater and no filter. Those are forms of animal cruelty. Make sure you remind the pet store peeps that. Or you can do what I do when someone works my last nerves: Make a voodoo doll out of there belongings, get some stick pins and stick away until the person feels all of your pain and anger and ends up in a psych ward.