It must be incredibly frustrating what you have been going through.  We are actually having a behovioralist come to the house and help with some of Diesel’s anxieties.  And it’s going great! But I would recommed a behavioral trainer and if that was the specialist you had come out then maybe try another one.  Do you think maybe the move have sparked up this unwanted behavior? Perhaps your vet would have a recommendation. And if you did that too.  Then I would maybe see what kind of rescues are near you for pitbulls.

Just my thoughts, hope it helps, good luck