Flipkart — Empty box received from Flipkart puma shoe

Address:

India

Regarding Order ID - OD[protected]

I ordered a pair of puma shoes from flipkart, as soon as I received the box it was empty and I straight away contacted the customer service for which they replied that the order wasn’t marked delivered on their app and I should call back later. I called the next morning and was asked to submit some documents and images and I submitted the same but the return got rejected. The same has happened three times. Each day I am calling and talking to an executive and they ask me to reply on the app and upload the documents and yet again it gets rejected. Each time I have to explain all things to different executives who give same computerised reply. Even after being a regular customer and prime member the customer service is pathetic. The whole process is time money and energy consuming. Please help me