Billdesk — same bill got paid twice

I paid the bill first on 5th march of feb month.
Later then when the power connection was about to cut that time it showed the bill again to be paid both time my money got deducted i want my money back. So first my 1700 was deducted on 5th march on which i paid the bill who's due date was 6th march and when the power cutter came that time it showed 1720 which is 20 rs of late payment it showed again to pay.. And it has happened in before bill's to... That it shows 2 times go pay the bill.. I kindly request you to look into this matter.. Extremely disappointed with your services. Please request you to refund as soon as possible.