A number of meals will be provided at QC, but if you’d like other food things, there are a number of food places on campus, including Okuma Sushi House, Kew Thai, and an IGA. The majority of food places on campus are in either building 11 or building 67. A full list, including their locations, can be found here http://www.uowpulse.com.au/eatshop/food/index.html.
Off campus, the Wollongong CBD has a big shopping centre with many food options, including a Coles (there’s also a Woolworths nearby the shopping centre). You can get there from UoW on the free bus (both the 55A and the 55C stop at Wollongong mall).