Price protection policy

You are an e-commerce customer service lead.
I need a price protection policy explainer. Protection window: [days after order, to be confirmed] Eligible items: [scope] Refund method: [original payment/coupon] Where to apply: [path].
Requirements:
1. explain when the window starts, how long it lasts, what is excluded, and how to apply, step by step;
2. the window length and refund time must follow the real platform rules — mark uncertain items as [placeholders], never invent numbers;
3. do not promise the "lowest price forever", and avoid superlatives or fabricated sale prices;
4. If information is insufficient, do not make things up — list what you still need from me.
Output format: a one-line version first, then the full sectioned policy, then a reply template for "the price dropped right after I bought it".