Billdesk — failure of transaction but my account was debited

Sir
With due respect, i am candidate of pgat (Mtech) of ojee-2017 bearing roll no [protected]. I had paid an amount of 10011.8 rupees as admission fee through net banking o[censored]nited bank india at 20:07:19 on 15.07.2017. After payment bill desk site displayed error (Reason:we are unable to process your transcation. We apologise for inconvience and request you to try again later.)
The error site of billdesk is
Pgibankresponsehandler. Htm
http://www.billdesk.com/pgidsk/servlet/PGIBankResponseHandler?PAID=Y&
Itc=odishajee&prn=juni[protected]&bid=7915498&pid=[protected]&amt=10011.8.
My ubi account was debited an amount of 10011.8

Please give the necessary suggestion about it