Why won't upper ball joint removal socket work?

UPDATE I acquired a used Snap On brand socket on ebay. That was more than 1/16" smaller diameter than the cheap Autozone/OEM brand I got first. The Snap On socket worked like it was supposed to on one side. I had no trouble. On the other side however, the facets on the ball joint were deformed by the cheap socket slipping off. Now even the Snap On socket will not get a grip. Now what? I tried to have a helper press down on the breaker bar while I pushed and that did not work. I am concerned a pipe wrench will deform the threads in the ball joint. Even though the ball joint will be replaced could it ruin the threads in the A arm on its way out? Somebody suggested Removing the A arm and putting the ball joint facets in a vise. I don't think a vise will grip it?