I had that happen to my 2012 MBP. Ordered replacement top case with keyboard assembly off ebay. Took a very long day to take it all apart, transfer to new top

I had that happen to my 2012 MBP. Ordered replacement top case with keyboard assembly off ebay. Took a very long day to take it all apart, transfer to new top, and reassemble. Worked first time. A few months later random keys would glitch. I use it like a desktop when I need to now.