Duplicate charge for one place- ****

I have had two very bad transactional experiences with Booking.com within a period of two months. In both cases, the same issue occurred: I made a single booking and completed payment, however Booking.com processed two payments for one room booking. In the first instance, I reported the matter to Booking.com and was advised to request a refund directly from the guest house. I had to follow up continuously for almost two weeks before the matter was eventually resolved and the refund was processed. The experience was extremely frustrating and stressful. Unfortunately, I am now facing the exact same issue again. On 30 April, I made a booking at Heri Guest House, and once again a double transaction occurred. I reported this immediately to Booking.com and, as before, was instructed to contact the guest house. I did so, however the guest house has refused to refund me and is instead referring me back to Booking.com. As a client, I find this situation deeply unfair. I am not aware of, nor responsible for, the transactional or contractual arrangements between Booking.com and its partner properties. I acted in good faith and followed the correct process. I should not be mistreated or disadvantaged due to a faulty payment process that I did not create. All I am requesting is a refund of the duplicated payment. I ask that Booking.com please liaise directly with Heri Guest House and resolve this matter by refunding my money. I have sent numerous emails and WhatsApp messages to both parties, yet to date, no one has taken responsibility or provided meaningful assistance..