Continuous Loud Noise From Playschool in residential area

Out neighbour has 3 continuous plots 2 have their houses, and are farther from ours(independent house).On the vacant plot , which is next to our house they constructed and opened a playschool.And very soon there was a lot of noise from children crying when getting dropped , to teachers yelling rhymes and poems.We have politely asked them to reduce the sound levels but of no avail. As if the noise pollution was not enough they started dance classes , where they play continuous very loud music and the instructors scream at kids about the steps. It is very disturbing for all neighboring homes and neighbors,some of whom are elderly , some with small children and few with children who are preparing for public exams in March. but they are scared to take up any action or even talk directly, as the neighbor is a known ex leader of a local govt organization and had close ties to this area politicians who themselves were chef guests at the playschool inauguration. This is all unfair as the playschool is right in the middle of a residential layout with the next homes less than 1m (compound wall sharing) and so much noise which we have to put up with. Please advise as the whole day is wasted due to this nuisance.