As noted: NEVER SIGN UP THROUGH A 3RD PARTY!!!
I would CANCEL your subscription through The Roku Channel, and subscribe DIRECTLY on the Paramount+ site. The drawback is this may require a new login and redoing your profile. You could also subscribe through Roku, which may use the same profile. That would probably be done by installing the app and signing up through that. Maybe someone who has done similar can give some info on what works.
The only drawback to not going through TRC is that you don't have a one-stop-shop to view everything together.
