If you just got the cham then this is normal. You'll need to build a trust between you and the cham. Best thing to do at this time is ignore the chameleon when you are in the cage. Spend time in the room with the enclosure doing calm activities where you are not making a lot of sudden movements. After a few weeks the chameleon will get used to you being there and will react less to you.
There are a ton of thread on trust building so I am not going to type it all out now. Just remember to not rush anything. This takes a lot of time.
Also, as mentioned above, fill out the form posted.
I would remove the green pad in the bottom since it will get moldy and dirty very quick with the multiple mistings each day. Also, you'll need to upgrade your UVB lighting to a T5HO or T8 linear fixture since the coil compact UVB bulbs do not benefit the chameleon at all in the long term. The compact bulbs will focus the UVB in a small area which the cham would need to spend a lot of time under to get the necessary UVB exposure.