Ask Apple, not us. Apple is the seller of record for everything in the App Store — the subscription and the one-time lifetime unlock alike are a transaction between you and Apple, not between you and us. Refunds are therefore entirely Apple's to grant, and we have no part in them: we cannot issue one, approve one, refuse one, or move one along. Not a single refund has ever needed our consent, because we have none to give. Writing to us about a refund cannot change the answer — it only costs you days.
The one route that works is Apple's own: go to reportaproblem.apple.com, sign in with the Apple Account that made the purchase, choose the item and say what went wrong. Apple decides and tells you directly, usually within a few days. If the answer is no, that same page is where you ask them to look again. You can also reach it on your iPhone: App Store → your photo → Purchased.
Everything else, though — something broken, something missing, something you cannot find — really is ours, and we answer it.