There is a website bookwindow.in which is of online shopping for books. I purchased a book cost Rs. 275/- on 14th April but I didn’’t get any response so I mailed them then. A mail came that book is out of stock. I send the Patym number also for refund.But its simply a fraud website, I also seen consumer complaint about it.
https://complaintlists.com/tag/bookwindow-in/