Win back a customer who left for a competitor

Help me win back a customer who has gone to a competitor.

Who they are: [type of customer and history]
When they stopped: [roughly]
What I suspect: [e.g. price, a slow reply, a mistake]
What's changed since: [anything]

Ask me up to 3 short questions first if anything important is missing. Wait for my answers.

Then:
1. A short, honest check-in message that invites feedback.
2. Replies for the likely answers (price, service, convenience).
3. A reason to come back that isn't just a discount.
4. What to fix so other customers don't go the same way.

Use only what I've given you, leave blanks for any price or fact I haven't given, and don't invent anything. UK English, no grovelling. Add a simple opt-out line to each marketing message (e.g. "Reply STOP if you'd rather not hear from me"), and remind me to message only past customers who haven't opted out; I'll check the ICO's guidance on marketing texts and emails.

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