Don't be afraid to take them back and point out their error at the top of your lungs! Be sure to include the salesman and service manager in the group.(argue)
If it took 3 trips to get the wrong ones, somebody obviously just blew you off & pulled whatever was on the shelf - just to shut you up. Don't be afraid to point that out either! I'd even stick the p/n on the mats in their face and make them read it back too you! Ask them what "WJ" stands for.
(deadhorse)
I'm not typically that way, and nobody should have to be, but poor customer service at a dealership is something I can't stand. After all, you just paid them how much for your new ride - and they're trying to screw you over on some floor mats that cost them around $30.00.
Might as well establish the fact that you're not going to take any crap now, you'll be back there in a few months to have the rear window regulators fixed, and more than likely they'll try to pull something there too...
I might be a bit bitter. I had to take mine to an "authorized factory dealer" (under factory warrenty) when my window suddenly "disapeared" into the door - not once, but twice (less than 36,000mi). Both times, they refused to replace the glass, even though the scratches where obviously caused when the glass fell into the door. Now that it is out of factory warrenty, I take it to the used car dealership where I bought it (under their extended warrenty) and they treat me right.
I'm sorry, but "SERVICE" is what a dealership should be about. It is the only way they will ever get me back in the front door when I decide to change rides again.