Nesco Orissa — excess electricity bills

Sir,
My electricity bill is coming in excess amount from the month of March 2019.I have complained regarding the same on 19.04.19 for installing a challenge meter by depositing a fee of Rs.300/-.I have approached the authorities several times, but they are not listening to my complaint.I am living here with a small family having two children & two adults.How the bill comes to such excessive amounts.Please instruct the concerned department to resolve the issue.
Consumer No.[protected]Sanjukta Sahoo, Badahal, Keonjhar)