@SqueakyRumble69 here's how you can return your Founder's Edition.
From the FAQ
If I return my Stadia Controller or Chromecast Ultra, will my subscription be cancelled? Will I be refunded for the Founder's Edition?
If you return all of the contents of the Founder’s Edition within 15 calendar days after the day you received it, your 3-month Stadia Pro subscription will be cancelled and you'll be refunded for your purchase. Returning the Founder's Edition also means you'll lose access to the games you claimed as a Pro subscriber, your Founder's Stadia Name will revert to a standard Stadia Name, and your Founder's Badge will be removed. If the Buddy Pass included with your Founder's Edition has not been redeemed at the time of your return, the Buddy Pass and 3-month Stadia Pro subscription will be voided. If the Buddy Pass has been redeemed at the time of your return, the included three-month Stadia Pro subscription will be cancelled and the redeemer will lose their Stadia Pro benefits.
And here's more specific instruction. When I opened this, it automatically shows for US and Canada, but you might get something different. The idea should be the same though.
Get a refund on Stadia in US and Canada
Return a device for a refund
Returning mine to for all the same reasons.
Google have failed us by not communicating correctly.
The crazy thing is, returns email with label to return came in minutes, code to play game.. still waiting days... If only Google had a few months before release to iron out issues.... oh wait...
Exactly.