Rosiegirl
What you want is not at all unreasonable, as most people in BA are represented by a union you would be hard pressed to make the argument that BA is an anti-union company. So given your desire for representation your choices are limited. The PCCC may become something though it has a long way to go, I think it missed an opportunity when it stayed faceless for too long - but that is just my viewpoint. The other option that you have is to attempt to effect change within BASSA from within.
To do that you need to have fresh elections which will not happen while the dispute continues as the undemocratic show of hands allowed the current leadership to avoid an election until the dispute is settled. So first and foremost you have to end this dispute, the best way to do that is to vote for the offer on the table.
Once the dispute is over, hold elections and press for constitutional changes within BASSA to prevent what you see as the poor practices from happening again. Elect reps that are more representative - establish quotas for reps in rank that reflect the make up of the union, ie do not let it be run by LH CSDs. All ranks must be represented in the same ratio they exist in the community, as well as the same ratio for LH and SH.
Or any other changes that seem to enable you to achieve your honest decent representation that you deserve. This may be a low point, but you now have the opportunity to make things better - but first this dispute must end. You know how to achieve that.