Tasmac — Sales man

Address:

Kodikkulam

I gave Rs. 500 and bought 1 beer for Rs. 150 and sales man gave Rs. 50 as change. After 30 min i checked my balance and came to know he given only rs. 50 instead 350, i went to the shop and asked the balance amonut, but sales was accepted and he argued in different way, . So please check the camera available in the shop and give me the solution. Shop kodikkulam, pudur madurai