I'm gonna be honest, I don't think your parents care if your chameleon dies or not. And the pet shop lady cares more about profit then the chameleon's well-being.
As mentioned by the others, you can give her away to people who can provide proper husbandry or you really need to get some money in order to buy the stuff you need.
As mentioned by the others, you can give her away to people who can provide proper husbandry or you really need to get some money in order to buy the stuff you need.