Tamil Nadu Electricity Board [TNEB] — Raised estimate charges/labour charges by TNEB for cable laying but consumer asked to do the laying

I am presently changing my single phase to 3 phase connection and strengthening by adding 3 kW. I was asked to lay the underground cable from pole to home and call the EB staff for installing the meter however TNEB has raised additional ESTIMATE CHARGES of Rs.7850 for cable laying but i was asked to do the cable laying by myself. I engaged labours and electrician myself and did the job by paying all the charges.

I have a severe doubt on TNEB raising ESTIMATE CHARGES online against my consumer number. How come they can raise the same without doing any work like that.

Is this fair? How to address this issue in a quick manner.