You agree to the terms of service below, and the Terms of Use for Substack, the technology provider.
If a refund request is made within 7 days of payment, Substack will issue a refund.
Any requests made beyond 7 days from payment will be at the discretion of the Publisher.
https://support.substack.com/hc/en-us/articles/8915992656660-What-is-Substack-s-refund-policy#:~:text=If%20a%20refund%20request%20is,the%20discretion%20of%20the%20Publisher.