Hotels.com no refund on botched booking

Booked online and paid upfront for accommodation in Polokwane at the Col-John Hotel. Booking was confirmed and guaranteed by Hotels.com. On arrival Col-John reception said they did not have the booking and have no arrangement with Hotels.com. Could not reach Hotels.com (number on website not rout-able) Spoke to hotel manager no joy. Had to find other accommodation. Reported to Hotels.com and requested a refund. 3 months later no refund and no response. WATCH OUT!!