Tamil Nadu Electricity Board [TNEB] — wrong eb bill

Address:

Sithalapakkam, Chennai, Tamil Nadu 600126

I stay at perumbakkam, my eb office is at sithalapakkam, i received my eb bill last month surprisingly it was only rs.250, verified meter readings and found that billing was calculated wrongly as rs.250 instead of 2700, i visited eb several times but person responsible for billing his name is vaasu is not responding properly he keeps complaining that internet or servers are not working hence cannot help, please help and provide solution, if the billing for this month is not corrected, then my next bill will be accumulated and have to pay 3 times more than usages. Please help