Booking.com Bad service

I booked through booking.com on the 2nd of September this year , only to find out that they’ve doubled the bookings in that place and I’ve only learned about that as I was about to check in. You can just imagine the frustration , that time the gentleman who were supposed to assist me at that Holiday House in Hartebee****rt was very rude saying I must call booking. com to refund me and he even didn’t want to open the gate for me shouting and hanging up the phone on me. I’ve sent the several complains to Booking.com asking for my refund till date I’m still waiting for my money. They’ve rep**** with an email saying they have refunded me the same day and I’ve asked them where , then they’ve sent another email saying because they’re international Co it may take a month 🙄 and a month has passed, still no communication.