Robbing customers

Clicks Nelspruit CBD is robbing people daily. On numerous occasions the price displayed on the shelves is not the same as what it scans at the till and twice already they have had to pay back my money after I discovered that they overcharged me. My colleague has also experienced the same and we've alerted the Manager and the Assistant Manager but they still haven't done anything. This practice is literally *****ing from customers. Their prices are also very different from the prices available on the website. On Friday 5 October 2018,I bought the meal combo and after I got home I noticed that the 440ml Poweplay which is usualy R14.90 was R20.50 on my till slip and on the same day we had had an altercation because my colleague bought EetSumMore biscuits displayed at R18.50 but at the till they were R21.90...so I guess this is common practise at the store and it's disgusting.