Union Bank Of India — money deducted from my account

Address:

Thrissur, Kerala, 680551

I tried to book a train ticket using my union bank atm card but the payment failed and i couldn't book the ticket but the amount of ticket charge i. E. Rs.100 deducted from my account. It happened before also when i used to do transaction using the same card. I kindly request you to refund me the same amount deducted from my account. Otherwise i should have to throw away the union bank card kindly do the needful.