Disappointed Customer Of Canceled Booking Apartment

I booked an apartment through Booking.com for a stay starting on 13 May and paid the full amount of 267 euros in advance. Three days before my planned arrival, the property cancelled my fully paid reservation and I never received any refund. After the cancellation I wrote around 30 emails both to the property and through Booking.com to get my money back. Until 25 June I was still receiving some answers, but after that date they completely stopped responding to my emails and my refund request was ignored. Because of this lack of response, my bank has now opened a refund case. I am extremely dissatisfied that my fully paid reservation was cancelled at such short notice and that I am still waiting for my refund. I request that Booking.com urgently returns the full amount of 267 euros that I paid and, considering the stress, the lost time and the fact that I had to involve my bank, I also ask for any additional compensation that may be appropriate.