A self-serve copy example for this shopper question: Can I cancel my order? Use it as drafting help for in compact wording that still links to full details without creating unsupported promises.
This is educational drafting material, not legal advice. Match the wording to the store's actual policy and operations.
Put the short version in compact wording that still links to full details. If the answer has exceptions, link to the full policy instead of trying to fit every rule into one sentence.
Good trust copy should reduce confusion without making the store sound bigger, faster, or more certain than it really is.