Thanks for reaching out here in Community.
Let us help activate your Roku device. We'd like to know more about the issue you are experiencing so we can best assist you. What are the steps to reproduce the issue you are seeing? What Roku model do you have? Maybe perhaps the remote is not working, we believe you have a Roku voice remote, help is available if you have problems pairing your Roku voice remote or if you need more detailed remote pairing instructions.
You may also see this related article:
General setup instructions (for any model)
Keep us posted on what you find out.