Myntra.com — missing item from product

I ordered some product however received one item less within it... And was informed that will be resolved by 8th july 2019 when i first called back on 5th july.
However there was no email or any point of confirmation.
I called back on 9th july and they now say we have system issue call back after 4 hours.
This is not the first time, i've gone through this. Last time too there was issue with the quality of the cloth and they said that they will not take the return