Booking.com

We made accommodation bookings in February 2018 for December 2018, and was charged 50% deposit. Due to circumstances we had to cancel and did so in September 2018. We never received the refund till date. Queried it 24 September 2018, again in November 2018, and the last response we got was 18 December 2018 and never again. Booking.com does not reply and until today we have not received the refund. I welcome them to contact me regarding my issue to make arrangements for the refund. They have all my details.