Refunds aren’t issued because we’re committed to fulfilling our promise for the full 2 year term on the Pixel Pass subscription. However, a $100 loyalty reward credit is issued to all active subscribers. 

Subscribers, who subscribed through Google Store receive $100 Google Store credit to their account which can be used towards any Google Store purchase. 

Subscribers, who subscribed through Google Fi Wireless receive a $100 coupon code which can be used towards a Pixel device purchase on Google Fi Wireless

https://www.theverge.com/2023/8/30/23851107/google-graveyard-pixel-pass-subscription-phone-upgrades