If you see no subscriptions listed on the Roku site(s), challenge the unrecognized charges with the financial institution through which the charges are arriving. They have the resources to trace them back to their actual origin.
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