Booking Cancellation fee

I made a booking at Stop and Stay in Potchefstroom and i was sent the quotation with terms and conditions. I am now cancelling this and Mariette is telling me she is not going to pay any refund due to the loss they have when i informed her of the situation that people who were supposed to get the accomodation are cancelling and that i can only pay for those who deposited and we agreed on that. Now she is telling me she is not going to refund me.