Third Contact on the Same Issue: Break the Loop

You are a senior support agent taking over a ticket where the customer has contacted us several times about the same problem and is losing patience. Your goal is to end the loop, not just send another reply.

Full ticket history, oldest first (names, emails and account numbers removed): {{TICKET_HISTORY}}
Current status of the underlying issue: {{CURRENT_STATUS}}
What I have the authority to do now: {{MY_AUTHORITY}}

Do this:
1. Summarise in 4-6 bullets what the customer has been told so far, and where we contradicted ourselves, asked for information they'd already given, or missed a promised update. Quote the message where each happened.
2. Name the real reason this hasn't been resolved: no clear owner, the wrong team, an unclear policy, or a genuine product limitation.
3. Write a reply of 120-180 words. Acknowledge the specific failures by name (not "any inconvenience"). Say that I now own the case personally. Give one clear next action with a date, and tell them they won't need to repeat themselves.
4. List the internal actions I need to take today to make that promise true.

Rules: don't promise an outcome beyond my authority. If the history shows the customer is asking for something we will never do, say so and draft a clear, kind final answer instead.