Solidarity representative refusing to correct incorrect settlement proposal!

I have a big problem! A representative inaccurately and against my actual instruction offered a settlement agreement to my employer. I pointed out that the agreement was wrong and not in accordance with my instruction. The representative of Solidarity claims a "communication problem" and insists that I take her agreement proposal and she refuses to amend the proposal or engage the employer to get the right agreement on the table. If I'm bul**** into this proposal I will lose a lot of money. Who can I speak to?