That's something that could be reasonably expected from a mega-corporation which has to deal with multiple layers of bureaucracy, but even in those situations a direct appeal to an executive officer usually gets the issue resolved. Getting the runaround is not something anyone should have to deal with when the company has a handful of employees and minimal, if any, layers of middle management. After all, isn't one of the primary benefits of being a startup supposed to be that the company is more responsive to customer needs?
I mean, that was his question. All he seems to have left is suing. He was asking if he had another option. And, of course the other option is "raise a stink on HN/interwebs". But that's a luxury reserved for "hackers"/VIPs, not lowly customers.
PG told him to sue DrChrono.
Which the poster has been doing, and it hasn't worked?
So, not looking for honest advice but using HN as a side channel.
UPDATE: I never said it wasn't well intended. I said it wasn't for honest advice, OP was using HN as a communication forum side channel.
UPDATE 2: If he wanted honest advice he'd have been wise to omit the start up name.
UPDATE 3: The primary purpose of OPs post was to use HN as a communication vehicle with the start up involved, not to seek advice.
UPDATE 4: If the OP was seeking honest advice then he wouldn't have posted the name of the start up. Posting the name of the start up which happens to be funded by the provider of the discussion medium you are using is going to result in BIASED advice.