Big Bazaar / Futurebazaar / Future Retail / Hometown — Refund needed for membership card

Few months back, I have taken Big Bazaar profit club membership and paid Rs. 10000/-. After Big Bazaar has been taken over by reliance the card was not being accepted there. When visited the store, a mail id was given for the refund.

Mails are being sent but mails are not getting delivered as the mailbox of them are full. Additionally none of the customer care numbers which are available in the website are working.

My Rs 10000/- is pending with Big Bazaar. Please inform, how to get the refund of the balance money.