Legal Letter for Booking.com Refund

I need a legal letter drafted to request a 50% refund from Booking.com for accommodation that did not meet advertised standards.

Details to include:
- The property's condition was significantly below expectations.
- Amenities were of lower quality than described.
- Issues included outdated or worn furniture and unclean, poorly maintained areas.

Ideal skills and experience:
- Legal writing expertise
- Familiarity with hospitality and consumer protection laws
- Experience dealing with refund requests or disputes