Billdesk — money deducted from a/c but it was failed transaction

Address:	743129
Website:	billdesk and central bank of india , naihati branch

During on line payment for exam fees of west bengal set exam-18 through central bank internet banking on 11/09/2018 at 13 hrs the fees amount rs. 1011 was deducted from my central bank a/c but it shows failed transaction but money not reverted to my a/c.After couple of hours later the said money is yet to revert to my account. please resolve the matter.