Firstly, keep it to this thread - stop cross-posting.
If air got into the system then you'll need equipment to bleed the ABS system - sounds like your 3 mechanics aren't suitably qualified and equipped, so consider taking it to the dealership or find a reputable independent shop.
Note, I haven't read your first post because the wall of text doesn't make for an easy read - it wouldn't take much to use a little punctuation.