what could be wrong with my car (2012 Jaguar)?

I was driving from Miami up to Panama City Beach to see family and stuff when I stopped for gas just outside of Miami. I pulled up to the pump and rolled down my guagwindow to push the call for attendant button. I then waited for the attendant to arrive, and ran my credit card and stuff on the pump, and said, "filler up", but the attendant didnt seem too happy with me. I had them check the oil and fluids and such, and they said I was low on fluid in the transmission. I said I dont ever open the hood of my car, (I'm a model not any kind of mechanic or engineer, and dont want to damage the engine by messng with it), hence I dont ever check fluids. I asked them to add fluid, and they said that my car took K9P Transmission Fluid. He said he could charge it to my credit card, and he then brought out 2 clear bottles full of transparent cloudy yellow liquid, and poured it into my car. I then pulled out and headed out across highway 41 and towards the gulf coast of florida.

I then began to notice the automatic transmission making strange noises and slipping gears about a half hour down the road, and then the car lost some of its oomph, and it had t be floored just to keep going 30 MPH. The big guage next to the speedometer then was running way higher than normal (whatever that means), and the little guage with the C and the H soon rose to the top H.

Eventually in the middle of the everglades the car just stalled out, and the engine wouldnt start, and spouted off all sorts of steam. I let it cool and started it back up and continued driving, and had several more stall outs, and eventually the car sopped putting off steam, but still stalled out. I thought I would limp the car to the gulf coast where I could get it checked, but the engine then started making all sorts of strange squeeking and rubbing and clanking sounds, and then suddenly BANG, a deafening sound rocked the car, and I lost all horsepower and then the engine stopped, and I coasted to a halt on the roadside in the middle of the everglades. THe car spouted off all sorts of smoke, and I looked under the hood and saw that there was a huge gaping hole in the engine, and some sort of weird black goop all over the place smoldering, and the wires insulation was slightly melted.

I called a tow company to get an estimate, and they said it would cost $200 to tow, and that seemed steep. I would prefer to just keep limping my car to the gulfcoast to a repair garage so I could get a cheap fix to hold me until I can afford more expensive repairs, as the tow company said repairs would cost at least $6,000. Should I just call for a friend to rescue me, and leave the car on the roadside until the big payday in spring fashion season. Its not like I cant afford the repair, I make about $175,000 per year and can afford a JAG and a Land Rover. but i dont want to spend much before my bigger paydays to help conserve my savings.

Could the station have put in the wrong fluid , or what could have caused the problems and what would be the cheapest option for now, should I just get back to miami and take the land rover to panama city beach. What happened and what could I do?