I rented a kimono, but I was not able to enjoy it to my satisfaction because it slipped out of place while I was walking around. I would like a refund.

First, check to see if there is a provision in the terms of use covering instances of kimono slipping out of place. If there is no such regulation, carefully explain to the store staff how long you were able to wear the kimono until it slipped off, the cause and extent of its slipping, and the situation at the time, and let them know that you were not able to fully enjoy the experience, and ask them to redo the fitting or extend the rental time.