Call them

Sun-Wed 11am-11pm Thurs-Sat 11am-2am Kitchen is open until 1am Fri and Sat..delivery until 11pm Specials:***ALL YOU CAN EAT PIZZA BUFFET*** Mon-Fri 11am-1pm and Tuesday Evenings 5:30-8pm

If you ate the pizza I see no reason a refund was necessary. If you did not than I'm sure they did.