Apartment maintenance

We are staying in a apartment where flat sizes are varying size . flat owners have formed association . we have been charged based on sqt feet rather than number of flats .we have been asking if all facilities are shared equally why big size flat owners have to pay more but no one is listening to us they come in group for the meetings shout and doesn't give chance to talk . committee members have small flats . I have waited long requested to arrange meeting to discuss they never conducted .this year I have paid maintenanace by calculating by number of flats rather then sqt feet. they have asked to pay remaining amount I asked for fair discussion and also convince why we need to pay more when I am not provided any additional service . they are not ready to listen I have sent a legal notice to conduct meeting how ever they denied . they stopped services like cleaning the common area infront of my flat , garbage collection, DG meter i.e back of electricity cut . In bye laws its not mentioned that we need to pay maitenace as per square feet . can you let me know what I can do . many big flat owners have concern but they are coming up . so should I keep quiet and pay the balance as they should their supremacy or any other way .