Ah okay. Well as you purchased your shares second hand from 212, you don’t technically have the voting rights; 212 does.
However! There have been instances like this on other SPACs and other members of the forum have found ways to exercise their rights. Example below;
You can probably find the equivalent phone line details online for the SPAC you’re interested in quite easily.
With regards to the last point, I’m not sure you can trade the shares in for NAV (I presume you mean if you are at a loss on the instrument?) if you don’t like the way things are going. You’ve purchased the SPAC stock, therefore are subject to the market movements of that stock. If you’re not happy with the target acquisition, you have to sell the stock, unfortunately that’s the risk you take.
When you sell, it will be at the price of that stock on the day, so you may profit or not. Although if there is an announcement on a merger target, I don’t think I’ve ever seen such news cause the stock price to fall.
Only way you can trade your shares in for NAV is A) if the SPAC does not complete a merger in the designated timeframe and subsequently dissolves, or B) if you coincidentally sell them when their market price is the same as NAV.