Bad service and failure to stand true on their commitments.

I have experienced bad service from the lodge, I made a booking with booking.com for an event that I planned to go around March, it cancelled two days before the event and I had to call the venue to enquire a way forward, which they sent out a new invoice with different date and policy instructions and insisted that I cancel through booking.com which I did.

Now it appears the people I had planned to go to the trip with will no longer be able to go with me again because of other commitments, I called the venue to inform them and make a cancellation because it will be no use for me to travel alone there. The venue insists that I did not cancel with booking.com and I did, I sent every information to support my theory and they were insisting that I should "cancel a booking that passed around March with booking.com first" and also have went silent despite my efforts and booking.com head office contacting them.