Meesho — Partial Order

I ordered 3 items in same order and i received only 2 items and 3rd one is missing and looking at the package it can only carry 2 items and no more than that and upon calling meesho they are declining for refund or giving me the missing item with reason that it is not meeting there T&C where as on there T&C it says reseller are responsible for end to consumer delivery
Order number[protected]