Macbook air keyboard and trackpad suddenly stopped working.

My 2021 Macbook Air M1 processor device; Although I encountered any problems such as impact, falling and getting wet, the keyboard and trackpad suddenly stopped working. According to the information I received from the Apple store and support; They have not encountered this situation before. Although there was really no problem, my keyboard and trackpad suddenly broke. They said that they would replace it if it was under warranty, but since it was out of scope, they said that the repair would be done by paying a fee. I am currently using an external keyboard and mouse to use the MacBook. What do you think I can find a solution for?