Couldn’t travel on my train to London

Durham train station, 30 April 2018

I booked special needs assistance for a train journey from Durham to London and said specifically that I needed to be able to access a disabled loo on my carriage. I turned up to board, and the train had no disabled loo. Apparently the train at that time is always a design that doesn’t have a disabled loo on the first class carriage. I had to wait for a later train, which was 32 minutes later. This was at 6.12 in the morning, I’d got up very early to get there and had to wait in a freezing station for over half an hour, and arrive late for my meeting in London.