Sanchi Milk Point — MRP

I have purchased 2 packets of sachi gold milk. the printed rate shown on packet is ₹ 28 but shopkeeper was charging 30 rupees everyday he was taken the money extra the sachi porler near me in my colony and when I asked him to give me the bill he refused to give me the bill he doesn't give me the bill of my purchase item the address of my nearest sachi milk parlour was inside the radio colony residency area indore 452001 a