Hi Dee96,
Thanks for posting in the Roku Community!
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, tap 'Resend' on your Roku device 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.
For full information on this, you can take a look at this link: How to activate or link your Roku® streaming device | Official Roku Support
If this issue is not resolved, please let us know along with any additional information you may have that would be helpful for our team to assist you further in this problem. Please include the serial number/device ID of your Roku device.
Please keep us posted.
Best regards,
Mary