Overcharged

Went to clicks Maponya mall about a week and a half ago, when I got home I found out that I was overcharged on a item, took the matter up with their customer service and ever since I have been awaiting their response. Sent them all the info they requested and the last e mail I received from them was on the4th of September stating that they referred the matter to the store management, 6 days later still nothing.