Since you just bought it, take it back and exchange it for a new one if you can.
If you're in the US and bought it directly from Roku you'll probably have to deal with Roku warranty support: https://support.roku.com/article/208757058
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
If this post solves your problem please help others find this answer by clicking " Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X