Kate and Mike

So I was told by a GM rep that they would fix the seal in my rear window (3rd light assembly). Now I'm being told they won't because it's out of warranty. They will do a cost assistance claim, which I was told by the supervisor at GM customer service wouldn't be worth it that I might as well use my extended warranty. My platinum warranty 5yr/100,000 originally told me they would cover it and now they wont cover it either because its concidered a leak. The dealership isnow telling me instead of sealing it the need to replace the window. What is everyone doing about this? My understanding is that this is a known issue for GMC and Chevy 2019-2023 models and that theirs a bulletin about this with the dealerships. How do I make GM pay for this since I didn't even know it was happening and it's been getting wet behind my leather seats all the way under it and my headliner is now stained. I would think this is causing a health issue with mold or mildew and a fire hazard since I have the electric back window and the defrost. Grateful for any response or suggestions. I'm willing to contact whomever to get this resolved. Ive even though about contacting an attorney on the matter. Thanks.