How to get always on display on samsung A20 in Android  10 version?

Few days ago my samsung account was  hacked by a hacker. He put his phoner number by deleting my phone number and created 2 step verification that’s why i could not log in my account. Than i communicate with samsung helpline by email. They reply me b...

When will get Samsung A20 Android 10 update? A notice was published about a20 android 10 update few days ago. And there mentioned in May   A20 will get Android10 update. But i can't get the update yet. What should i do?  

How much to change samsung A20 display.