Booking.com is a ****

I booked to stay in Cape Town 24 on york guest house (7days) through Booking.com paid R4500.00 for my stay. The room was a mess I couldn't even breath in it immediately called Booking.com to cancel my booking and give me a refund so I can can book another place for the remaining 6 days in Cape Town. I'm still not assisted Booking.com only gave me R144.00 and since I went on vacation on a budget. I was forced to change my flight to come back less than 24h of being in Cape Town. I told they can't assist further than R144.00 if the property doesn't want to pay my money back. I couldn't even stay 20min there... I've emailed them pictures and all but they are not interested at all. Why do you treat us paying clients like that???