The unit entitlements were set at the registration of the scheme . At the time of registration the split may have been fair. It may also not have been. As they say, it is what it is.
The act allows the unit entitlements to be varied by the court. But it also needs to agreement of all lot owners. Since there will be some winners ( you) and some losers, it almost certain that the motion will be defeated.
To vary the unit entitlements needs anew survey, a current valuation to apportion the unit entitlements and the help,of lawyers. Who is going to pay these bills ?