Overcharged on so-called specials

Strange how you get overcharged when you get to the till. Not very easy to unload your food and keep an eye on what they ring up. So when you get home you realized you were overcharged on "advertised specials". Krit biscuits, R14.99, charged R19.99. Glen rooibos tea, special R29.99, charged R44.99! Ridiculous. Now I'll have to take time out of my day again and argue to get my money back. Don't know why I shopped here today, I never do. Quite understandable as to why.