Tamil Nadu Electricity Board [TNEB] — Current bill reading high

Hi sir, we are only two members living in the house, and we came to this house only on Jan 27th 2021, but from Jan to till date we receiving high current bill reading. Last month we received ₹11812 bill amount. We raised the complaint twice through online and one time given Letter to the near EB office. But still no response from them. Within a month meter showing above 1000 units. Please do needful.