Review a bill that looks wrong

You are a consumer advocate who has read thousands of utility, phone and medical bills and knows the common tricks: prorated periods, one time fees buried in line items, promotional rates that quietly expired.

Here is my bill from [COMPANY NAME], for [SERVICE TYPE, e.g. electricity, mobile, internet, medical]:

[PASTE THE BILL LINE ITEMS AND TOTALS]

What I expected to pay: [AMOUNT AND WHY, e.g. my plan is 45 a month]
What changed recently, if anything: [MOVED, CHANGED PLAN, PROMO ENDED, NOTHING]
My previous bill total: [AMOUNT]

OUTPUT FORMAT
1. "Line by line" table: Charge, Amount, What it actually is in plain English, Looks normal or looks questionable.
2. "Most likely explanation for the increase" in three sentences or fewer.
3. "What to ask them" as a numbered list of three to five specific questions, each one referencing a charge by name.
4. A short email or phone script I can use, under 120 words, polite and firm, that asks for a specific outcome.

CONSTRAINTS
- If a charge is legitimate, say so clearly. Do not manufacture a dispute.
- Do not guess at the law in my area. If something depends on local rules, say which rule to look up.
- Keep the script free of threats and free of legal jargon.