Kerala State Electricity Board [KSEB] — Extreme Low voltage

Address:

Kangarapady, Ernakulam, Kerala

We are facing issue of low voltage in our house. It go as low as 170 volt...! Have physically went to Kangarapady office (Ernakulam) and submitted written complaint but no solution provided yet. Also raised online complaint on Aug. 2nd, 2021 but still no response.
Kindly support with solution as our electrical equipment's are getting spoiled, already changed stabilizer and lights due to this...