Shocking Service!

I made a booking through Travelground expecting to be protected in the process. Owner of apartment changed my booking to a horrible dirty smoke reeking place.. I informed her that we were unhappy upon arrival. I also phoned Travelground logging a complaint. Next morning I get told that I will get a refund but that I have to pay for 1 night's accommodation and a cleaning fee. No assistance from Travelground, just posting my complaints to the owner - back and forth. Travelground claims that it is my responsibility to manage the booking with them and I should have informed them of the change. What do they get commission for? To manage the booking with the owner - why is it my responsibility? I asked for the Terms and Conditions that stipulate this and they have decided to not respond to my communications. As a supporter of Lekkeslaap I will never use this forum to do bookings again. Would rather use Airbnb a thousand times over before every looking for accommodation here. I expect my full refund. I had to waste 2 days of my week holiday to type emails and complaints.