Yes, get a refund if you can. The scope is not worth that much. You can get an excellent pair of binos for the money (or for less). If you really want a scope and you are willing to spend up to $500 (incl. delivery), get the 8" Dob. Biggest aperture per dollar. Big aperture -> more light collecting area -> more brightness -> more things & detail you can see.
If you have something against mirrors (e.g. maintenance, weight, size),
AOE are having a sale on refractors. $250 will buy you a much better refractor than the Bushmaster.