Reliance Energy — Misusing of reliance electricity

I residence of sita bai chawl borivali west devidas ext near mamta hieght facing a problem of fluctuation every time the neighbour starts the washing machine which is of 5 hp and is operated on same meter box in which rest of the residence have there meter every time the machine is on there is fluctuation in every houses there is fear of catching fire due to huge load capacity kindly look into the matter and solve the issue as the main line in the meter box is of 10 sqmm and its taking the load beyond its limit

Thanks