Paschimanchal Vidyut Vitran Nigam [Pvvnl] — bill related consumer no.[protected]

I am a consumer of pvvnl, residing at ghaziabad, consumer no.[protected]
I have been paying my electricity bill well in time, i. E. Before the last date.
But the amount which was supposed to be paid after due date, is being added in the subsequent months, as arrear.
As a result of that i am not getting any advantage of paying my bills in time, and loosing apprx. Rs.35/- per month.
Please look into the matter and do the needful at the earliest.