@Kim_k101
You can go to the Subscription Management page (https://store.google.com/subscriptions), select your subscription, then click on the "More" icon (the 3 vertical dots) and select "Cancel subscription".
If you happen to have the old 1st gen Nest Aware subscription (we haven't the 1st gen subscription since 2020), I think you can go here:
https://store.nest.com/account/subscriptions
(It doesn't work for us anymore.)
Or you can try the "Contact us" option under "Nest Aware Premier Care" on the page below to "Get 24/7 access to Nest Aware Experts on the Nest Customer Care team. They’re available to answer questions, help you access features, and manage your subscription."
https://support.google.com/googlenest/answer/9233159
