Wrongfully advertised and now won't pay money back

I booked a place in Sea Point and the pictures showed that there was a bath tub. When I arrived, I was checked in late and showed to a room with a shower. The receptionist said she would change it to a room with a bath tub when I got back from my appointment or she would call me. When I got back she said there was no room and that I can only be accommodated for the next two nights. This is not what I paid for so I checked myself out. Now they don't want to refund me even though it wasn't my fault. I should not have spent the last three days In Cape Town worried about accommodation. I cancelled the accommodation and I did not spend the night there at all as my belongings were only kept in the room until I was supposedly being moved to another room, now they are saying they can only refund me if the nights are booked. I got another Airbnb that night as it had a bath tub. The people from Propr admitted that it was their fault 100% but they still won't refund me. I have all messages and pictures as proof. I am not happy with how they are dealing with the situation either. Please can someone assist?