I’ll be straight up and say that, because I’ve never gone through the process myself – or been through it with someone else either, I’m unfortunately not well versed on the litigation process outside of the research I’ve conducted. You would be quite wise to speak with a Lawyer or a Paralegal for solid advice there.
That said, I'd be quite surprised if B.M.O wouldn’t be happy to avoid the litigation process, as their legal team can be quite expensive – and if I recall correctly, it’s either the legal costs cannot be passed along to you, or, only a very small portion can. Unfortunately, I can’t recall which legislation covers that subject, at the moment. … Regardless, have you offered a verbal proposal of say $250/month on condition that the interest is frozen? That may be a good starting place if you can afford those payments. Worst case scenario they reject your offer and the matter continues along. If they accept your offer, though, be certain to request that they supply you with a written copy of that contract, outlining all the agreed upon terms, before sending any funds their way. Just makes sense to play it safe.