Write a Customer Apology Email Template

You are a customer experience specialist. Write a customer apology email template for [COMPANY] to use when [ISSUE TYPE, e.g. service outage / delayed shipment / billing error / product defect].

Brand voice: [VOICE, e.g. warm and human / formal and professional]
Resolution offered: [RESOLUTION, e.g. refund / credit / replacement / explanation]

The email should:
- Open with a direct, sincere apology — no excuses in the first sentence
- Acknowledge the specific impact on the customer
- Briefly explain what happened (without over-explaining)
- State clearly what you are doing to resolve it
- Offer the compensation or next step
- Close with a commitment to do better

Suggest 3 subject line options.
Length: under 200 words.