Wrong price all the time

The problem i experience with usave is an almost everyday problem and also my friends and relatives complain about the same thing. The put the less price on shelf when you go to the till the price is different is totally inconvenient. Usave makhado dzanani biaba is a shop which is 50m less away from my home. So to us everything you just go there. No need to pick a wallet to avoid unnecessary buying but we also in short. On shelf cheese is R12, 99 and you that's the price with other shops go to the till R16, 99. When i complain they tell me sorry price has changed on the system but the staff did not change on shelf that is every day dramer at Usave it's so inconvenient. The problem is even if you go 2 days after you will find the price has been not changed. I don't know what kind of advertising is that were you confuse consumers