Warped Engine Block?!

My friends, I have been in this headache for over a year now. At the beginning of June 2022, my Pacifica had error code p303 come on, the same error code that came on less than a year ago in August 2021. Cyclinders misfiring and coolant intrusion both times. Last year, repairs were approved and head gasket replaced. This June when the error light came on again, I found the nearest shop to read the code and was so upset to hear the same code being read. There were 3 week waits at all dealerships around me. Both dealerships and the shop I was at said I would be fine to drive the car as long as the check engine light did not blink. I had camping plans that weekend hundreds of miles into the desert and did not feel comfortable with that risk. Instead, I parked the car in my garage, canceled my trip, and even decided to have the car towed at my own expense rather than drive it to the dealer. After it was determined a new engine was needed this time, the dealer informed me they were awaiting warranty approval. It took 3 weeks before learning coverage was denied. "Repairs were declined due to the failure to properly care for the vehicle / continued operation in an overheating state." The dealer appealed and thinks it should be fixed. The dealer who sold me a Pre-Certified vehicle appealed thinks it should be fixed. Yet here I am, having my lawyer send a letter to Stellantis. 3 months of summer with no car to drive my 4 kids. If you have a Pacifica and are getting cylinder misfire codes, drop it off at the nearest trade in lot and run.