Vishal Mega Mart — The size of the product is not as per the standard

I purchased vest of 80size for my son of 10years old. The vest of 80 size is meant for 12-13 years boys. As the products with is not of standard size I approach your Raipur store for exchange which was not entertained by the persons at Raipur store. I request you to direct your manager at Raipur to change the product as the specification is not as per the standard specification. In case of non response at your end I will force myself to move to local consumer forum for redressal of my complaint. the details of bill is as follows:
Bill No-017/[protected]
Counter No-16
date;22.05.2016
time-19.45.13
item no[protected]/KB_JB_VEST QTN-1 Rs.80.00