BSNL landphone billing
Extra payment

SIR,

I AM ROSA ANTONY.I AM A SUBSCRIBER OF BSNL LANDPHONE SERVICE.I APPLIED FOR ECR PAYMENT OF BILL THAT IS BILL AMOUNT DEBITT DIRECT FROM MY BANK ACCOUNT.I APPLY FOR THIS SERVICE IN FEBRUARY.THIS SERVICE ACTIVATE NOW.IN 4th MAY DEBITTED RS 276/- FROM MY SBT ACCOUNT.MY LAST BILL AMOUNT WAS SAME 276/-.BUT I ALREADY PAYED THIS AMOUNT IN CASH AT POST OFFICE IJK. HOW CAN I RETURN MY EXTRA PAYED AMOUNT 276/-.THANK YOU