Mail after update 26.2.1…..totally changed and needs to be returned back as before.

Problem with 1). ringer and with 2) email presentation after update 26.2.1, RINGER: the sound buttons stopped working correctly. I increase sound with side buttons, it immediately goes back down to NO SOUND. THE RINGER will not work. Can not use iPad sound. EMAIL where is search “button”, where is “remind me” button?