Hi dbhavesh,
To address the issue of double payment, the best people to help you out will be Customer helpdesk. To reach them you can use the following link in the help section:
http://pages.ebay.in/help/contact_us/_base/index.html
Choose ask about bidding or buying in the first box, in the second box choose PaisaPay transaction, and in the third box choose I need refund or any other heading that you think explains your problem more clearly.
The helpdesk will then get in touch with you to help resolve your problem.
Warm Regards,
Sapana