Booking.com Failed to Honor My Confirmed Hotel Reservation After a Pricing Dispute

I made a hotel reservation via Booking for Hotel Central Hannover in Hannover for the dates 18–24 October for approximately 100 Euro, with the condition that the payment would be made at the hotel. The reservation number is 5297989730. After the reservation was confirmed, the hotel informed me that there had been a hacker attack on the system, claimed that the price was displayed incorrectly, and stated that I either had to accept a higher price or contact customer service to have the reservation cancelled. Based on this justification, the hotel effectively rendered my reservation invalid and refused to accept my stay. I also have written proof in our chat with the hotel that they declared my reservation invalid due to a supposed cyber‑attack and cancelled my stay. The room I had booked was already a modest one with a single bed, shared toilet and bathroom, located in the basement and with negative reviews, yet despite these conditions determined and published by the hotel itself, they did not comply with the agreed price and terms. When I reported the situation to Booking customer service and requested support, including a solution for the price difference, they told me that there was an obvious pricing error and that, for this reason, they could not do anything to provide me with a new hotel reservation, a similar alternative, or cover the price difference. In the chat with Booking customer service, they clearly refused to offer any compensation or practical solution. As a result of the hotel unilaterally and effectively cancelling the agreement under the pretext of a “price error” and Booking, as an intermediary platform, failing to offer any solution to remedy my loss, I have suffered a serious grievance. I request that my original reservation be honoured as initially confirmed, at the price of approximately 100 Euro, or that I be provided with accommodation under similar conditions in a comparable hotel in the same area. If this is not possible, I expect Booking to offer a concrete solution and adequate compensation to remedy the loss of rights and grievance I have experienced.