North Bihar Power Distribution Company [NBPDCL] — regarding high voltage

I rajni kant ranjan s/o awadh kishor sah at priyankar (Hat tola), gram panchayat itahri dhamdaha purnea. Here more than 300 voltage is supplying, everything is burning like wire, fan bulb even stabilizer. I have called everyone like local electro fitter j e and also purnea office but they are not taking proper response only pretending. We r facing these problems 3-4 months. So please do whatever possible.