How to handle undelivered orders from online merchants?

Hii Shopify robbers,

I made a online payment of 383 rupees for purchasing a headset tws ear buds.The merchant is boulttt.myshopify.com.but the merchant has not delivered the item till now and from the order confirmation email the tracking order link is vanished what to do now give me my rupees back or I will complaint in Central forum.