Myntra.com — payment made but order not received, order id:[protected]-7942501 dated 23.09.19

Address: Noida, Gautam Buddh Nagar, Uttar Pradesh, 201301

Couple of days back i have been cheated by myntra by delivering less number of items than ordered for a pre-paid placed order. On complaining they are showing cold shoulder and just replied "full order is delivered and we will not entertain this claim further".
It seems it no longer safe to place pre-paid orders as there is no-one to listen.
Anyone here please guide me for further action as i don't want people to fall prey to such acts.
Order id:[protected]-7942501 dated 23.09.19