u/Pale-Budget-2003

Hello, I am staying in an air bnb and was left without water in the bathroom for a day. The host did make reasonable efforts to fix it and I understand I cannot expect the same standards of service as a hotel, but I am thinking it would be fair for me to ask for a partial refund as I was unable to shower or flush the toilet in that time. My question is how much is reasonable? I have a figure in mind, but would like to hear others thoughts. I have paid around £900 for a stay of 7-8 days.

Thank you.