POOR SERVICE FROM BOOKING.COM

On the 13th of December 2019, I booked accommodation for 2 days at Luh Guesthouse (Reference no. ***) in Durban for 6 people through the booking.com website. On the 14th of December when I was 70 km away from the guesthouse, I received an email from the guesthouse indicating that there was a glitch on the system resulting in the double booking. I was asked to call booking.com. I called and was informed that I will receive my refund within 7 to 12 working days. Both 7 and 12 days has passed and I have not received my refund. I have tried in vain to follow up on the issue. I just wish the company can honour their promise and refund my money.