Misleading accommodation

I booked accommodation for 3 day via Booking.com from 24 -27 of Dec 2019 and upon my arrival the place was unbearably filthy which the management of the hotel agreed and offered to use their office to look for an alternative accommodation. I did managed to get an alternative accommodation even though it was last minute. The hotel could not refund me as they had not received any funds from Booking.com and no money was ever paid to them due to my cancellation. After back and forth Booking.com ended up paying me for 2 nights instead of 3. I was refunded R2268 instead of R3402. Booking.com refuses to pay me the one day balance till to this day.