Booking.com Date Changed After Payment: Cancellation & Refund Request

I made a reservation myself via Booking.com for Hilton Garden Inn Tulsa South and I am absolutely sure that I selected and double checked the dates 21–22 August for my stay. However, after completing the payment, the confirmation email I received showed different dates instead of 21–22 August, and I only realized the mistake at that point. I immediately called the hotel, but they told me they could not do anything and that I should contact Booking.com. I have been trying to reach Booking.com since then, but I have not been able to get through to any support channel, so I am effectively stuck without help, even though the wrong dates do not reflect what I selected when booking. Because I still needed a place to stay on the correct nights, I went ahead and booked Hilton Garden Inn Tulsa South directly for the correct dates. However, due to the amount already charged for the wrong reservation made through Booking.com, I do not have enough money in my account to comfortably cover the second booking, which is causing me serious financial stress during my trip. I request that the reservation made with the wrong dates via Booking.com be cancelled and that I receive a full refund for this booking, as I did everything correctly on my side and checked the dates before purchase, and I should not be penalized or left out of pocket because of this situation.