Refund approval reply that keeps the customer

A customer has asked for a refund and I'm approving it. I want to reply in a way that doesn't lose them as a future customer — most refunders come back if you handle it well.

Customer name: {{customer_name}}
Order ref + product: {{order_ref}} — {{product}}
Reason for refund (their words): {{reason}}
Refund amount + method: {{refund_amount}} via {{refund_method}}
Time to process: {{processing_time}}
Anything I want to offer (replacement, credit, future discount): {{offer}}
What I'll do internally to fix the root cause: {{internal_fix}}

Write a 130–160 word email.
- Subject: "Refund approved — {{order_ref}}"
- Open: confirm the refund is approved in line one. No suspense.
- Acknowledge what they experienced in one sentence — specifically, not generically.
- Process details: amount, method, when it lands. Use bullets.
- Optional: the offer, framed as "while you're here" not "to make up for it".
- Close: thank them for telling me — most customers don't, and it's how I improve.
- Sign-off as {{your_name}}.

Warm + concrete. AU English. No "we apologise for any inconvenience" — use a real sentence instead.