Flipkart — 17 items Missing ordering grocery of 22 items And refund rejecting flipkart again and again

Ordered 22 Grocery Home needed items For my home which amount of 4992. They given a percel and taken full amount while i unboxing i found there only 5 items included and 17 items Missing. But fraud seller made invoice of full amount and taken wrong way full amount.
I contacted flipkart and raised missing items refund request but flipkart Without any call directly rejecting my refund request please take legal action on it. i belongs to a nuclear family and now facing loss by choosing Flipkart for groceries purshace.

Please refunded my 17 missing items balance i am raising Return but flipkart rejected again and again. Really harassing and trouble.