Ajio — Refund of extra amount of Rs.400

Today my order is delivered at my home and I paid him Rs.1305 by mistake, instead of Rs.905. The initial price of my order is Rs.905, as shown in below images. I have attached the image of receipt of the order packet I received just now and the screenshot of message of that order amount. I am trying to call that number from which i received the call to receive my order, but it's unreachable, saying invalid pincode.

Please kindly look into my matter and refund my extra amount of Rs.400 as soon as possible either directly to my bank account or to my ajio wallet.