Sorry you are having problems.
That's one of the reasons I recommend buying from the approved stores here (see banner at the foot of the page), which include Adorama, B&H, Amazon.com (Amazon themselves that is, not all 3rd party sellers on Amazon are good), and J&R. EBay can be OK, but you have to be very careful who you buy from.
I've personally dealt with all the stores I approve (as listed above) and they all have customer service departments that are helpful (except for eBay!). None of them will "rip you off".
I've never dealt with Dbuys.com, but I see they are one of the Brooklyn camera stores, and many (if not most - if not all) the Brooklyn stores are ones I'd hesitate to deal with as I describe in the article which you can read here:
http://www.bobatkins.com/photography/photo_gear_buyer_beware.html You will also see that Dbuys.com is one of the listed stores on that page.