People should stand up for themselves more, you deserve to be paid for your work. The client is the only person who should be in trouble. Don't be afraid of trouble.
There's a legal system to settle payment disputes. Using it is the civilised, and safe, version of "standing up for yourself".
Many service providers will put up nondescript error pages when the account isn't being paid. That's somewhat safer, but might not apply here: service providers are refusing to continue service. They're not changing a product that was already delivered.
Legally speaking, you probably should be. Contracts work when done properly.
According to https://www.cga.ct.gov/2012/rpt/2012-R-0254.htm that makes it a Class B Felony.
Plus the prima facie tort for the lost business.
Are you sure it's such a good idea to go around looking for trouble like this?
There are plenty of legal recovery avenues without going looking for trouble and pretending it's just standing up for yourself - a defense which will go nowhere in a felony hearing.
http://kenyalaw.org/kl/fileadmin/pdfdownloads/bills/2017/Com...