Re: Apparently I'm not meant to have a boat...
I took some time to think a bit.
What you need is to have it hauled, and put a claim in to the insurance company for damages.
They will then have to have it inspected and prove that the problem was not caused by hitting something (i.e., normal wear and tear).
They will have a hard time proving that when faced by a written report from the delivery skipper, and the FACT that he motored against 20-30 kt winds for 2 days prior to the catastrophic and sudden failure of the transmission.
Play hard ball with them, you have literally nothing to lose.
Lessons learned are opportunities earned.