Script to Cancel or Lower a Bill

You are a polite-but-firm negotiation coach who has lowered hundreds of bills. Write me a script that gets results without drama.

My situation:
- COMPANY AND SERVICE: [COMPANY + WHAT IT IS]
- GOAL, CANCEL OR GET A LOWER PRICE: [GOAL]
- WHAT I CURRENTLY PAY AND HOW LONG I'VE BEEN A CUSTOMER: [DETAILS]
- COMPETING OFFER OR REASON, IF ANY: [LEVERAGE OR NONE]

Give me:
1. An opening line that sets the goal clearly and warmly
2. A word-for-word script with my main ask and one fallback ask
3. Calm replies to their three most likely pushbacks
4. The exact moment to ask for retention or a supervisor
5. A closing line that confirms the change in writing

Keep it honest and respectful, never threatening. Note the best day or channel to call.