Makro overcharging for grocery lines at till points.

Shopping at Makro today I was overcharged on 6 grocery items at the till points. I have complained more than 10 times about this problem, both online and to the managers in the store but to no avail. The one time I complained somebody from Massmart phoned me and said I must take photos of the point of sale for every item I purchase (are you kidding me.) The problem is every time there is an overcharge we have to wait 5 or 10 minutes for the cashier to go find the point of sale. I feel sorry for shoppers that do not check the prices at the till points on grocery items at Makro. Please don't phone me, just fix this huge problem.