Myntra.com — product order is lost by the company during shipment

Address:	Jammu, Jammu and Kashmir, 181121
Website:	www.myntra.com

I ordered a combo of hair straightner+ hair dryer (Philips Miss Fresher's Hair Styling Kit HP8643/46 ORDER NO:[protected]-9961001) from myntra on 4th of september 2018 on discounted price of Rs.1313.13. now its price is rs. 1871. the tentative delievery date was 9th september 2018 but they failed to deliever it on time. i contacted them and they told me i shall get some update within 3 days and when i checked my order today the site is showing that its lost. although they gave me a goodwill coupon of 40% but its of no use as i cannot use it while ordering the same product, it says coupon not valid on the product. what kind of compensation is this! it is a total fraud done to customers.
i request the company to deliver me the fresh product with same price with which i ordered it before as its solely their responsibility that the product should be delievered to the customer on time.
or they should validate the 40% coupon on the the desired combo of hair straightner and hair dryer (Philips Miss Fresher's Hair Styling Kit HP8643/46)