I tried to book a German train ticket. When I first initiated the transfer, the amount got debited from my bank account and the train booking was unsuccessful. I tried for the second time and this time, my amount got debited once again and the train booking was successful. After a few minutes, the amount which got debited for the unsuccessful booking was credited to my account again. But the next moment, the same amount got debited again and I have no idea why. I don't know what to do. Please help.
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