UK consumer cooling-off rights for distance contracts can apply, but they typically do not apply once you ask to start digital content (a challenge, session library, or membership period that has begun). By tapping Start challenge or unlocking content you request immediate supply.
If a payment fails, Stripe retry rules apply. If you believe a charge is wrong, contact your trainer first, then HomePTKit support via the site operator.
Trainers may offer additional goodwill refunds. Platform application fees already collected on a refunded charge follow Stripe Connect refund behaviour.
This page frames refunds for the scaffold. Confirm the final wording with counsel and your Stripe merchant settings before taking live payments.