Thieves gained entry to FoodWorks last Monday night, damaging doors, destroying a cash register and taking computer equipment.
Manager Kelly Sibbald said the store was struck again in the next 24 hours when thieves tried to gain entry by smashing a window.
The break-ins were not the first in the area.
Ms Sibbald said she had been managing FoodWorks for more than four years and had been the victim of at least six break-ins.