Big Bazaar — charged twice for billing by debit card

Address:

Mumbai City, Maharashtra

I used my debit card to shop from BIG BAZAAR, Raghuleela Mall, Vashi, Navi Mumbai on 6th Feb 2015 for a bill of Rs.2260.61. The cashier swiped my card and asked me to enter my PIN but said it did not work so she swiped again for the same amount of Rs.2260.61 and I re-entered PIN which was accepted. I got 2 messages for debits from my bank ( total amount - Rs. 4521.22) but thought it would get reimbursed since she told me the first transaction failed and a bill was not printed. Now it has been a month and I did not receive any refund and I have been charged for Rs.2260.61 extra. I would like this to be resolved ASAP and would like to know why the money was not refunded. I am attaching my bank statement showing I was charged twice for the same transaction and did not receive any refund from BIG BAZAR. Details - First transaction - Ref:[protected] Second transaction - Ref:[protected]