Hi @GameGirl,
Greetings from the Roku Community!
We will be more than happy to assist you further with this problem. The activation link expires after 15 to 20 minutes. If you see "Your account activation link expired" or "We can't seem to reach you by Email" when trying to use the activation link, try clicking or tapping "Resend" in the email message you received from Roku, and another email will be sent. After a moment, look in your inbox for another message from Roku with a new activation link for you to try.
If you continue to see either message after receiving a new activation link, try activating your Roku device using a different email address.
Hope you'll find this info useful. Please keep us posted on what you find out.
Cheers,
The Roku Community Team
John
Roku Community Moderator