Identify the exact order without starting it
Find the film or episode in My Stuff, then Purchases & Rentals on the website. Match its title, edition and transaction date with the order you intended to return. The help explicitly warns against pressing Play when opening the detail page for this purpose.
For example, checking whether the accidental purchase is the extended edition does not require starting the film. Use the listed details and receipt. A download made as a viewing test also matters under the stated condition, so do not treat offline preparation as unrelated to the return question.
Use the title’s order action
The documented action is Cancel Your Order, which may also appear as withdraw, followed by a reason and cancellation confirmation. Check the option actually offered for that transaction. The help gives a separate note for Apple-paid orders, directing users to the relevant product page to inspect the available options.
The fourteen-day period is not the only condition. Compare both the date and the playback or download history before expecting the automatic route. If the option is absent or the circumstances differ, ask official support about that actual order instead of promising that every unwanted purchase is refundable.
Verify the completed return rather than a membership change
Prime Video says the refunded title is removed from Purchases & Rentals and the refund goes to the payment method used for the order. Retain the resulting confirmation. A cancelled membership, a removed watchlist entry and an order refund are separate outcomes.
If the purchase remains unclear, provide support with the order reference, date and selected edition through the official account route. Avoid starting another copy to compare it while the return is unresolved. For future prevention, inspect the account’s purchasing restriction options separately from the remedy for this existing transaction.
Questions about this guide
Should I press Play to confirm the mistaken title first?
The accidental-order guide explicitly says not to press Play on the detail page.
Is being within fourteen days enough by itself?
No. The guide also requires that you have not attempted to watch or download the item.