It was a $3 per month business VoIP phone number redirecting service, and the termination fee was $3000 if you didn't use the correct termination procedure, which involved knowing a password in a web form only my grandfather knew, or passing a 'my password is my voice' phone login. They also allowed termination by a letter to their HQ, with a $3k fee. I think the fee was more of a "we can only offer low prices if everything is automated, so we charge a stupidly high fee for anything we can't automate".

I don't want to name the company, because the dispute is still ongoing.