I can't vouch for these but a Google search comes up with the following:
https://roku.pissedconsumer.com/customer-service.html
Complaints/ Feedback:
Headquarters:
https://www.elliott.org/company-contacts/roku/
Stephen Kay
Senior Vice President & General Counsel, Roku, Inc.
150 Winchester Circle, Los Gatos, CA 95032
accessibility@roku.com
Phone number: 408-556-9391
Fax number: 408-364-1260
Start calling folks...I am.
Forgot one...
Federal Trade Commission
600 Pennsylvania Avenue, NW
Washington, DC 20580
Telephone: (202) 326-2222
...Just got off with tech support. They told me to give them until 12/7 so they can try and fix my problem. Not great but not like some of you folks...2 months...ouch! They also told me the 10.0 rollback is suspended from Roku's end.