Nykaa.com — missing ordered items

I have placed an order on 2nd of may for 16 items and they said that the order has to be delivered in two parts. The first one was delivered on 4th may which should have 13 items according to nykaa but 3 were missing from it... And i received 10 items only... I called on their customer care no. They told me to put the pictures of all items and bills that i received on their email... I did that. But even after two days of wait.. There is no response... This is ridiculous. There must be some strict action should be taken for them
My order no. Is nyk[protected]