Deposit refund

So we decided to go to the lido hotel for our Christmas lunch with my partner, parents and grandparents. We paid 50% as a deposit for the lunch. We all arrive at the venue to find no one was there. Eventually after walking around we found a gentlemen. He told us the Christmas lunch was cancelled due to no water or electricity. We never received a call. So lucky we managed to find as venue elsewhere that could assist us for the lunch. Since the 25th December we have been back to the lido on several occasions to have our deposit refunded. After numerous emails and calls we eventually got hold of the owner Xolani. He has been promising day after day the money will be refunded so after a week still nothing. Now we are at our wits end and we have been extremely patient for 3 weeks.