Company Dragging Their Feet On Right Of First Refusal

I left my company in September and had a number of vested options for exercise. This company does allow options to be sold on a secondary market, pending a Right of First Refusal where they have 30 days to either match the offer or allow the sale.

I worked with a third party marketplace to facilitate the sale of my equity. Everything was completed on our side aside and a request for ROFR was sent to the company over 45 days ago. The company has still not acknowledged after multiple emails. The deadline for exercising my options is approaching this week.

The third party says we cannot move forward without a waiver despite the company not acknowledging and the deadline passing. It feels like the company is trying to wait out my option exercise deadline in case I don't have the funds to exercise which leaves a really bad taste for our parting. I do have the funds to exercise but don't want them tied down indefinitely for a sale that should've already been completed.

Is there a way to legally move forward or am I beholden to a company that's ignoring their own deadline?

I can provide more details if requested if that'll help!