Booking.com Won't Cancel My Hotel Reservation Without Penalty

My reservation at Hotel Antonio’s in Samos was made via Booking.com under the name Şevket Tek**, with booking number 5545137043, for the dates 31 July–3 August. Due to the cancellation of my trip, I needed to cancel this reservation. When I checked, I saw that free cancellation was no longer available and I contacted both Booking.com and the hotel to kindly ask for an exception given the circumstances. However, both parties replied that it was not their responsibility and did not offer any solution, even though the entire amount of 546 € is now at stake. I am disappointed that neither Booking.com nor the hotel has shown any flexibility or willingness to help, despite the fact that the reservation was made through this platform. I request that my reservation be cancelled without penalty, or that a fair alternative solution be offered, such as a refund, voucher or date change equivalent to the 546 € I have paid or will otherwise lose.