Big C has good shops. And the prices are low, and the range is huge. From food, to furniture/appliances. There are imported products, even Russian ones like kefir, cottage cheese, and dumplings. They bake normal bread. There are maximum discounts on finished products in the evenings.
A wonderful shopping mall in a non-resort area of Phuket. You can buy everything here: fruits, souvenirs, household goods, and the services of qualified Thai massage therapists.