[Resolved]  Stayclassy.in — One mobile case not received of 4

I had ordered 4 cases for oppo F15 on 30th October 2021. Today I received the order but only 3 cases were sent. I didn't get the 4th one which was the costliest among the 4 ordered.
Order no is 4042863.
I have sent a mail regarding this to their mail, but there's no reply.
I have the proofs of ordering 4 cases and got only 3.
I want the 4th case or the total refund of not given case.
I have attached here the screenshots of payment and the receipt. The clear mobile case worth 249/- is not sent.
Look into it ASAP.