Owners/service Manual problems of the 2012 Subaru Outback

I bought my car used at the end of 2015. In 2017 my Subaru Outback began make a whistling sound when the brakes were applied and also began to shake at a low idle before stopping the car. I took it to a Subaru dealership and had it inspected but they just determined it was the brakes and changed them out. In 2018 my Subaru began to shake even more violently, almost as if another vehicle behind me had bumped into me, and then would stall out. This appeared more so on hills at first and then started happening on flat surface roads. I went back to my Subaru dealership who again ran my VIN and inspected the vehicle but determined "could not duplicate the issue". $900. 00+ later I went on my way only to have it continuously happen more and more. I was at 90,490 miles at the time I got my 90k mile servicing done. I had asked the servicing department if there was anything reported on my vehicle that I needed to be aware of. They stated that nothing popped up in their system. I never received a recall or safety warning letting me know that there is a huge concern for cvt to the point of extending the coverage automatically. I am not a mechanic. I dont know what codes to look for or what lingo to give them other than my exact problem and trust that they did the research and performed the correct protocol. I just did the research and had they read the bulletin for 16-90-13r they would have seen for my specific make model and year of car that it states "customer may experience sensation like coming to a stop in a manual transmission equipped vehicle and failing to depress the clutch". In other words, stalling. I would also say 16-104-17 applies as well but the year does not add up with my vehicle. I have a special needs son who needs therapy daily and this is my daily driver. I'd like that to be highlighted in the event of our death due to not being able to have this remedied.