Violation Of Apartment Complex Bye Laws

Our association committee is not collecting funds according to bye-laws, assessment should be made on sq.ft basis, but here they are collecting equally from all flats, there is no difference between small size flats and big size flats. We gave a complaint to the registrar, he says he has no right to question the committee, about why they are violating the bye laws. What to do now, what can I do to make the committee follow the bye-laws. Can we do any arbitration type, I don't want any fight with the committee.