Veiled chameleons are grumpy. I personally love it. Gary, mine, always acts so big and tough. But he's actually sweet.
Give her time to settle down, make sure she's in the room you spend the most time in. She will come around if she can see you plenty. Make sure her enclosure has plenty of hid spots. That'll boost her confidence since she knows she's able to get away.
Make sure you have a free range spot for her, that makes them plenty friendly. And talk to her. . .she can't hear you, but she'll see your face, learn you, and become comfortable.
Gary gets mad now if I dont take him out and let him hit on my wife.
Theyre great chameleons of you have about 2 weeks worth of patience. Dont give up!