Dell did something similar to me, but way scummier a decade ago with my Dell XPS L702x.
I bought it spec'd down with the intent to upgrade it myself with parts I had a better deal for. It was advertised as having two DIMM slots, and I ordered it with only one small stick of RAM because I had a source for two of the largest supported sticks.
When I got the Computer, there was only one DIMM slot. The technicians had me take the entire thing apart looking for the second slot under they keyboard, but instead I found a an entire unpopulated part of the board with the words "DIMM 2" printed on it, with no slot to put another stick of RAM into.
When I figured out that they had lied in their spec sheet, I asked for a replacement motherboard with two DIMM slots. They explained that for computers ordered with less than 2 sticks of RAM, they use a single-slot board.
I pointed out that the line "2x DIMM" was on my order, and they complained that the only in-stock version of the motherboard that was compatible with 2 sticks of RAM was the version for the 3D version of the laptop which would require the complete replacement of my computer with a better processor and better monitor.
After calling them daily for a few weeks, and sending them a letter from a lawyer, they finally shipped me the new laptop. Bought myself a pair of active switching 3D glasses and hand fun with that for about an hour before finally enjoying my laptop like I intended to.