Tamil Nadu Electricity Board [TNEB] — Eb problem with 1 phase regular fluctuation and disconnection

Address:

Old 20/1, New 48 northcresent road, T.nagar

Sir I have 3 phase line .my connection in one phase is a big disturbance it's fluctuating, increasing in power, lower at times, cut off and connect at times.whats the solution sir I have checked my electrical linings it's all fine, there's a problem from the power input (eb).if you could sort it out it's a great service from this changed government.expocting your valuable service sir .thank you.