Ok, sorry that is not how I understood it. Perhaps had you notified Aqua Mania ahead of time they would have worked with you. Not sure what the policy is but usually anything not cancelled prior to a specific deadline does not qualify for a refund.

I am booked on a Regatta spectator boat with Aqua Mania and the confirmation states a 24 hour cancellation notice for 100% refund and 50% refund if cancelled less than 24 hours before departure. No show-no refund.

Hope the person is ok now.