Self proclaimed association office bearers

Sir, Our society association was formed in 2019. But ever since it was formed a tussle is going on between the large flat owners and small flat owners regarding the maintenance charges. Small flat owners want it to be based on sqft basis but large flat owners want it on slab system. They want to pay only marginally higher than the small flat owners. The smallest flat is 515 sqft and largest flat is 1487 sqft. This tussle led the large flat owners to form a new association in dec 2021 and it was subsequently cancelled by the registrar of society in sep 2022. The registrar asked us to hold elections and fix maintenance charges after consultation with all members. But the large flat owners have self nominated themselves and have declared themselves as the new office bearers and have again implemented the same slab system of maintenance charges and are threatening to cut power and water supply in case members don't pay. The president nominated is not even a resident of our complex but he bad mouths everyone and doesn't allow anyone to question him. We have submitted a complaint regarding this to registrar of society Chennai What else can we do to re-establish proper association here.