Puma — Product was missing in package

I have ordered a puma tapered woven men’s running pant on 10th july 2020, on 14th july the package was received but when i opened it was a paper instead of the product. I was afraid because i paid 3499 rupees online but not received any product. Then i did a mail regarding this problem to puma on 14th july. I received a call after 4 days, i answered the questions they asked, but till now i have not received any solution for my problem. I need refund of my order. Help me