I see a lot of this 'one strike and you're out' kind of post here lately. I understand folk's frustration with this kind of stuff. But this is another case of cutting off your nose to spite your face. Not considering 440 Source or any other competitive supplier for future purchases does the buyer far more damage than it does the offending supplier. But if it makes you feel good, go ahead. And trying to rally others to that position will likely fall on deaf ears, too. Which is the only reason to post a bad experience.

We recently had a less than stellar experience with 440 Source, too. But to cut them off would cause us more problems than them. And would fix nothing.

Good luck to the OP with his other suppliers. If he takes this tact with all of them, he will run out of suppliers because no one is perfect. Especially today.