Sad attitude, Julirs knows what he is talking about. Pet stores are generally a bad place to do research. I hope you sell or return her quick as that is a bad setup and you are unwilling to make any effort. Not that you care but a chameleon needs a linear UVB light, does not need substrate and that cage does stand up straight, you just have the wrong liner (I have several of these cages).
I apologize to everyone else about the rant, I don't care to leave messages that may not seem polite.