In short: Link Council AI sells nothing yet. Every account is free, so there is nothing to refund.
Today
Paid plans have not launched. No account is charged, and no payment details are asked for or kept.
When paid plans launch
Paid plans will be sold by Paddle, our merchant of record, which processes payments, refunds and invoices. This page will then set out when a payment can be refunded and how to ask for it, before anyone can buy.
Questions in the meantime go to the operator's contact address.