Sorry to hear this, but Kent is a good (albeit slow & sometimes forgetful) guy. Being a very busy guy, I suspect you have made numerous attempts to contact him, which, at this point, he sees as little more than harassment (I understand how things look from your side, but I am just telling you what I think is happening at his end). I would send 1 final email asking him, politely, not to forget about your watch & to keep you posted on its progress if the work will require him to keep the watch for more than 1 (additional) month (from the date the email is sent). Then, wait a month & see what happens. What I would not do is start threatening or cajoling. That will only make a bad situation worse (for both of you).
In the meantime, I would encourage you (& anyone else dealing with Kent) to search the RWG archives for other RWG members' experiences & I think you will see that, while not happy about the delays & mistakes that occur along the way, most were ultimately happy with Kent's work.