Billdesk — unsuccessful challan amount deducted

I made online payment for railrbothdrcard, mumbai on 10.03.18 at 16:46:03 hrs through my bob bank debit card. But my transaction was unsuccessful due to technical problem. But my amount of rs. 500 was deducted from my account. No transaction id was not found. Again i have applied online payment at 16:49:56 hrs. I paid another transaction. This time my transaction was successful. So i want to refund yesterday's deduction amount. I request you to fulfil my wish. I will grateful to you.