Do a Factory Reset on your Roku. You'll be setting it up again as though it were a new unit.
Your channel selection is attached to your Roku account so be sure to link to your existing account (as indicated by email address).
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.
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Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X