First off, welcome to the forum! And this is posted in the wrong section. But I'll try to help anyway, I know you have had the alignments done and what not, but it sounds like either a ball joint is shot, or most likely a tie rod end. But you would think they would see that in the allignment shop, so I'm not sure where else to look. Are the shocks worn out? Does it sag on that side of the vehicle? Torision bars weakened or out of adjustment? If you have been taking it to the same spot for the work, is it a familiar place, or a new place? Do you have a trusted mechanic?
The list can go on and on, but start with the service tech, ask him what he thinks, and go from there.
Good luck!