2011 Jeep Patriot in shop- need 2nd opinions

My 2011 Jeep Patriot with just 60,000mi broke down in a city I’m unfamiliar with, I’d like opinions if the local repair shop is treating me fairly or taking advantage.

I drove 70 miles that day with no indication anything was wrong. The car was then parked for the day but would not start when leaving to go home. Seemed to have full battery power it just wouldn’t turn over.
The lightning bolt icon was displayed on the dash. A fellow was helping me out with a diagnostic tool that we plugged in but it was unable to determine the malfunction.
Had the car towed to nearest shop I could find that would take it in and be able to start on it the next day.

After diagnostic, was told the non-starting issue was caused by the TIPM Module. They insist the replacement TIPM can only be purchased new from a dealer for $2,000
I agreed to the repair, all in the bill is $3,200.

Called them the day it was promised to be ready to confirm so I can coordinate a ride there. I’m told the new TIPM did not solve the problem and the car will still not start and that I now need to replace the PCM module (another $800 in parts/labor)
I’m now into this for 4 grand + they now state that a new PCM may not even correct the problem leaving the door open for who knows what next.
Haven’t checked but gotta think the current repair bill is getting close to whole worth of the car.

Does this sound unfortunately reasonable or scammish?