Not sure from your posting what exactly you have done to contact Hyannis. In any case, this particular dealer's web site for Honda Care warranties is at
https://hyannishondacare.com/ and the sales guy to interact with there on the subject is Sean Rausch at (774) 470-4054. If you fill in the info form on their web site, you will get a current quote for all available plans by email, almost immediately. There are many Honda Care extended warranty terms available, ranging from 3 years, 35K miles (D34) to 8 years, 120K miles (D82) and with or without a small deductible (the C plans). I haven't seen any better pricing ($1,304 for the popular D80, 8 years 100K miles) from any other source on this forum, but I also haven't read every posting either, so you might want to do some further research on pricing, etc. from different dealers that offer the Honda Care products for the Clarity PHEV.