Booking.com Overcharged Me for Three Reservations at Clinknoord Hostel in Amsterdam

I booked a stay at Clinknoord Hostel in Amsterdam through Booking.com, but the reservation was processed three times, resulting in three separate charges. I contacted the hostel, but they informed me that they cannot issue a refund. I have also emailed Booking.com's customer service multiple times but have not received any response.

This situation is extremely frustrating as I am unable to resolve this issue, and no one from Booking.com is addressing my concern. I urgently request a refund for the extra charges and immediate assistance to rectify this matter. Below are the reservation numbers for reference:

4949476270
4825625856
4***240090
Please resolve this issue promptly to alleviate my inconvenience.