Booked a hire car through Ryanair in April 2022 for collection in August 2022 at Knock airport.The car was allocated to me by Hertz who Ryanair allocate booking too.The seatbelt on my hirecar came away from the drivers floor mounting on my first evening in Ireland Could not get through to Hertz at Knock airport as desk closed when this happened.I was in a remote location so had to drive car illegally without seatbelt to get back to my accomodation.Stlll couldnt get through next morning so sent email to Hertz customer service. Never had a reply back so reported at Hertz when i returned car.Correspondance has been ongoing by email including photographic evidence of faulty seatbelt and eventually Hertz agreed refund of half my rental but said as booked by Ryanair they have to refund to me and Hertz will confirm this to them.Ryanair are refusing to make the refund and Hertz say they are not allowed too as booking made through Ryanair app.I am owed money refund agreed but no way of getting either parties to pay me.Any advice what i can do next as i am living in UK and at my wits end Catherine Bishop