You already made your step by asking this question with URL for your site(that is a cool design attracting and less price compared to some other sites and try to change the font of the promo. It would be better, if payments through wallets were added and some more gateways).
Coming to promotions, you can use Zukerberg's services with your friends(Facebook, Instagram n What's app). If you still want to promote n have some momey, try to sponsor any Instagram fame or YouTube channel in your area. I hope these are the cheapest and fast moving adverts. When you choose accessories field, try to bag the most valuable thing in advertising that is ‘Word of Mouth', you can only get this by the work n quality, more over customers satisfaction.
Try some give away contests in Social Media sites. Increase your database by Lessening your profit per order.
Hope, this helps. All the very best.