Let me guess, you bought from Atlanta Hobby? They and a few other dealers have been very shady and putting that they had the P2 with H3-3D in stock when all they had was the P2 version 1. They mail out the version 1 with an email saying the H3-3D is back ordered and you will get it with the mount when it arrives. Problem is that you have to use a mount which adds weight and you get an outdated P2. You paid for a new Phantom 2 so you should get the new one. We know about the hole in the body that has changed but there could be a bunch of internal changes to the P2 version 2. I don't know for sure but since the P2 was launched, we have had the light bridge and the FPV hub. Its possible the new version has a plug and play setup that doesnt require the hub. Either way, I'd return it and demand what you paid for.
Which dealer did you get it from? Be careful with dealers. Not all are the same. UAVproducts, 1uas and B&H were my top three. After getting a used zenmuse from UAVproducts, I no longer use them. They stated "its brand new" and "all sales final" but since I had 3 zenmuse before it, I know exactly how they are boxed and it shouldn't be scratched from someone removing a screw. So at this time 1uas.com and B&H are my go to dealers. I prefer 1uas because they give you points and they have free shipping. Plus a larger catalog for aerial stuff.