Kebabish extorted me

I had such a horrible experience of being overcharged by this restaurant. I ordered from them through Mr D then when the food was delivered they put a menu and a sticky note that says they offer more reliable and cheaper transport and you save by buying through them. So the following day I tried them directly, on the menu the item was R65. When the driver comes he says the amount for everything including delivery is R100. I was shocked out of mind but I paid then scrutinized the receipt. They charged me R70 for a 65 rand order and delivery was R15 twice. I WhatsApp the lady who took my Ofer because you can also place the Order through WhatsApp. She calls and says o sorry we charged you incorrectly for the meal we will take 5 rand off your next order . I asked her how much is delivery Ana she said 30 rand. The delivery is soo extortionist for the distance it’s literally 5 to 5 minutes away. They still kept my the money they over charged me because saying you will take it off my next order is ridiculous because I will never want to order there again. I’m just shocked that we are suffering as a country financially and you extort people who still support your business in the midst of a pandemic