To write to Amazon. Once they even broken through the fault of the user screen think covered by the warranty, then loose the button and even more.
By the way, in 30 days kindle can be returned without explanation.
clementine_Trembl answered on October 8th 19 at 01:12
I have a button to switch to the next page and side volume button are free running. More than a year of use the reader, so far nothing has disappeared)