Lifestyle — exchange of product purchased

Address:

Thiruvananthapuram, Kerala, 695011

I bought a sunglass from lifestyle store trivandrum, kerala a couple of days back. When i tried to return the glass and select a new one, the sales person told that returning of product is not allowed there. But in the bill copy, it is specified that the products purchased can be returned or exchange within 3o days. This store is located in "mall of travancore", chakai, trivandrum, kerala.