Cheating customers

29 April 2018 - Bought a slipper marked at R190.00 vat inclusive. However when i paid i was charged R200.74. After the sale and i paid i checked the slip i noticed this and ask the cashier to sork , she called the supervisor and was told that its the vat rate. However they cant do anything at the time as its almost closing and will need to return the next day. Since I live far from Mall of the South i think they just refused to help and sort. Why did the charge me more i think its cheating.