Myntra - Myntra not refunding my amount

Had purchased a sling bag from Myntra. Raised the return request on *th Dec, ****.Was intimated to pick it up on **th, then **th, again **th,again **th and again false date of **th.. Seriously surprised to see such date changes for pick up.. Product received is of lower quality and false information on myntra's site regarding the product. No one is bothered to solve the problem and keen on extending the pick up Date by **hrs... This is total fraud and cheating by Myntra... The bag which should be *** bucks from market they are charing also *** bucks.. Requested to pick up the product and refund my money.. No one is helping out here. So please help me to lodge a cheat and fraud Case against myntra