Billdesk — refund against failed transaction

I would like to inform you that on the day of[protected] time 4:52 pm i used upi online payment rs. 850 for the challan of ibps rrb to ibps. [protected]@hdfc bank.in the above case money deducted from my a/c but it was not successfully paid to ibps site... The transaction was failure to ibps site... So its humble request to check why money is deducted but not successful in ibps rrb site and please refund it