1. It seems like your target market is Indian women in USA (guessed based on prices in $) IMO this is still not a niche market. Is your target market Indians who immigrated to US or born here? What age group (working moms vs students)? Why do they need these clothes (casual wear vs Indian parties vs weddings, etc.)? Does your target market live in major cities (like Bay Area) where there are a few offline options available or do they live in remote locations where the nearest Indian grocery store is 50 miles away? Or maybe I am completely wrong and your target market is non-Indian women in US.
2. What did you learn from driving traffic to the site? I see that you listed phone numbers, did anyone call? I would highly recommend using Olark/Zopim and actively chat with people who click on your ad campaigns to ask them what they are looking for.
3. Checkout IndianRoots.com. It is owned by NDTV, the biggest USP they have is free world wide shipping and I know a few people who have already used it. Not sure if you can compete with them on free shipping , but worth looking at.
And as the article says, talk to your users. Running ad campaigns work to drive people onto your site but you'll have to talk to your users to find out what are their pain points and what do they need.