Huh, interesting. In my years of buying from airsplat I've never had any trouble at all with them sending used guns. Every one of them I've bought from them has come perfectly wrapped. Maybe they ran out of stock and went "Crap! Here is the wall model" They should have at least told you that it wasnt going to be "brand spankin new" or at least ask.
To be honest though, other than the stock breaking, which could have been the shipping company, the rest is all cosmetic and looks like it was a wall hanger for their walk in store. Ask them nicely for a return and keep persisiting. If they wont do that, start taking it up with the medium you used to pay (hopefully paypal as they will resolve the issue quickly, if it isnt paypal, and a Credit Card company then prepare to follow a back charge on it for damaged goods and a lack of ANY response) I bet you will get your money back after you send it back.
For those who have bought Chinese guns US side remember, they are NOT up to par with other brands like CA,ICS, G&P, etc in terms of external or internal quality. Although they are getting better they still have similiar problems to the above simply from the company testing the gun to make sure it works.