Myntra.com — ordered a watch on myntra of bad quality

I recently placed an order and the watch is of bad quality and the belt tore already twice and the shop repair guy said that the quality is bad and have to get it repaired from the original store.
Either help me returning the product or help me fix the product.
I'm really not satisfied with the product. And i never expected this from myntra. I have paid so much and help me with this defect product