Calcutta Electric Supply Corporation [CESC] — Constant Voltage fluctuations and no response to docket

Dear Sir,
We are writing this letter to bring to your attention the issue of constant voltage fluctuations in my area. We reside in Uttarpara Kotrung, Hooghly -712258 and a nearby area, and for the past few days it's on extreme state. We have been experiencing constant voltage fluctuations from 5 pm to 3-4 am daily. These fluctuations are causing a lot of inconvenience to me and the entire neighbourhood.
Also no response to the docket raised. We are paying for everything we are using. Not getting for free. But customer service is poor. They say it's on high priority and keeps that unattended.