[Jason Abbadon]

Wait...hold on now.

The people at Target are not the villians here- that's the asshat that swapped the Legos for junk.
We've all seen stuff like the classic "Cantina Swap" move and lamented at how the customer service people could be so damn dumb as to fall for that....but this lady had likely seen it before, suspecteds omething fishy and caught it.

And, sad to say, you look like a scumbag.
You're not one, obviously, but they dont know that.
Everthing you did is exactlyw hat some swapper would have done- that they looked fora swap at all shows that they've been had many times.

If I was in their position (and I have been) I'd never accpt that return- my job's policy is simple: If we cant resell it, we dont accept it as a return.
Ever.

For boxed stuff- all of us- need to be extra careful. Examine the box for re-taping and sorta shake the box to see if the weight is right and contents are not moving around in the box.
If it's suspicous, have the store's customer Service Desk open it in the store- otherwise you might get hosed too!

Sorry that you got ripped off, man.