Indian Bank — amount not refunded back to account

Address:

Mumbai City, Maharashtra

I used my atm debit card at a shop in mumbai and they said the transaction did not go through the first time. However, i received a text message that the amount of 1315 rupees got deducted. But they wanted me to try again so i did. The second time, the transaction went through but another 1315 rupees was deducted. The amount was deducted twice. The shopkeeper informed me that it would be refunded within 24 hours but it has not. Kindly help me refund that amount.