At what point is it acceptable (or "not unacceptable") to call out a vendor in the forum? Person/company XXXX committed to a few things as part of a fee-for-service back in January, and I'm now about ten emails / voicemails chasing these down, with no responses.

While I know the "trial by internet" is frowned on (but not outright forbidden) here, I'm also getting really desperate for the items, and have exhausted the avenues I can think of to get satisfaction. (Unfortunately, the "stop payment" period with my cc has passed).

(Obviously, I'm biased and looking for replies to support calling them out, but I'm also curious about when it is and isn't acceptable, generally).