Act as an expert UK Consumer Law Advisor specializing in digital services and AI products. Draft a formal complaint letter using the following parameters:

**CONSUMER DETAILS:**
- Name: [CONSUMER_NAME]
- Location: [UK_REGION] (England/Scotland/Wales/Northern Ireland)
- Account/Order Reference: [REFERENCE_NUMBER]

**SERVICE DETAILS:**
- Company: [COMPANY_NAME]
- AI Service/Product: [SERVICE_NAME]
- Purchase/Subscription Date: [PURCHASE_DATE]
- Price Paid: [AMOUNT_PAID]

**THE ISSUE:**
- Specific Failure: [ISSUE_DESCRIPTION] (e.g., 'algorithm provided incorrect medical advice despite fitness-for-purpose claims', 'AI tool fundamentally unfit for advertised use', 'persistent hallucinations rendering service unusable')
- Impact: [CONSUMER_IMPACT] (financial loss, safety risk, consequential damages)
- Evidence: [EVIDENCE_AVAILABLE] (screenshots, error logs, correspondence, expert reports)

**RESOLUTION HISTORY:**
- Previous Contact: [PRIOR_CONTACT] (dates, methods, company responses)

**DESIRED OUTCOME:**
- Remedy Sought: [DESIRED_RESOLUTION] (full refund, partial refund, service termination with refund, compensation for losses, repair/replacement)

**LEGAL FRAMEWORK INSTRUCTIONS:**
1. Cite Consumer Rights Act 2015, specifically:
   - Section 9 (Satisfactory Quality) - if AI fails to meet standards reasonable person would regard as satisfactory
   - Section 10 (Fitness for Particular Purpose) - if AI was sold for specific purpose it fails to meet
   - Section 11 (Goods/Services matching description) - if marketing claims were misleading
2. Reference Consumer Protection from Unfair Trading Regulations 2008 if misleading AI capabilities were advertised
3. Mention UK GDPR Article 22 if automated decision-making caused detriment without human intervention

**LETTER STRUCTURE:**
1. **Header:** Full postal addresses, date, reference numbers
2. **Subject Line:** Formal Complaint - [SERVICE_NAME] - Statutory Rights Breach
3. **Opening:** Clear statement this is a formal complaint under Consumer Rights Act 2015
4. **Background:** Chronological facts without emotion
5. **Legal Basis:** Explicit citation of Sections 9/10/11 and why they apply to AI failures
6. **The Breach:** Technical details of how AI failed (bias, inaccuracy, unavailability, safety issues)
7. **Remedy Sought:** Specific action with deadline (14 days for simple refunds, reasonable period for complex investigations)
8. **Escalation Warning:** Mention of Trading Standards, ADR schemes (Civil Aviation Authority, Communications Ombudsman etc. depending on sector), or Small Claims Court
9. **Closing:** Professional sign-off with 'without prejudice' clause if compensation claimed

**TONE REQUIREMENTS:**
- Assertive but professional (no threats, only factual legal consequences)
- Technically specific about AI failures (avoid vague 'it doesn't work')
- Legally precise (use terms like 'breach of statutory duty', 'satisfactory quality', 'fit for purpose')

**ADDITIONAL CLAUSES TO INCLUDE:**
- Request for written response under company complaints procedure
- Reservation of rights to claim consequential losses
- Data protection notice if personal data processed by AI is relevant

Generate the complete letter ready for sending, with [PLACEHOLDERS] for any missing specific dates/amounts.