Levis — Defective jeans

Address:

New Delhi, Delhi, 110078

I bought a jean from Levi's showroom in Dwarka Sector 12 in New Delhi in the month of June .i wore it once but was surprised to see that many threads from the thighs portion have surface giving a shady look to the jean. So I returned it to the showroom. Later I got a call from the showroom and was told to select any jean in liew of old one. Accordingly I selected two jeans which were on sale under discount. The said showroom sales in charge refused to give me these jeans and I was compelled to buy another one which was manufactured in the year 2016 at a higher price of Rs 3400 whereas my old jean costed me Rs 2999. Thus I had to pay Rs 400 more.
In this regard please let me know your policy.