Ajio — Cannot place return request

I bought women pointed laser cut flat shoes camel brown with Order ID - FL[protected]
It was delivered on August 2nd . The size is larger than expected so I want to return the product.
But I can't place a return. When I try to open return window it says : Order details for this order can not be loaded . Please try again later. I tried so many times
I tried using the self care link shared, but it was of no help. Please make arrangements so that i can return this product to you. If I cannot return this product and receive a refund i have no other option than to refuse the orders which are already shipped. I am afraid that I will face similar problems with the new orders too.