NHTSA Complaint #11702954 — 2019 RAM 1500

I have a rear window leak that is that is from a manufacturing defect, as described in this TSB: https://static.nhtsa.gov/odi/tsbs/2023/MC-10247466-9999.pdf I originally took the vehicle into the dealer in advance of my factory extended warranty expiring and they said they would call me back to schedule a fix/replacement. They never did. Now, my extended warranty has expired and when I went back in to schedule, they are saying that the repair will not be covered, despite the TSB and warranty extension being in place because the "XL1" code does not show up in their system. The dealer instructed me to call Stellantis Customer Care, where I was connected with an overseas call center that said they were unable to do anything and that I should return the vehicle to the dealer, who already told me they will not cover the repair. It has been several months of back and forth and I would like to get this corrected before I go through ANOTHER winter season with a leak.