I guess you have done the right thing in giving awesome the chance to fix the problem, but they don't want to know or can't fix it?
I would take it to vw for a diagnostic and repair, if fully itemised report suggests awesome were at fault, i would seek some compensation from them.
I would not take it to another indy, although that might be cheaper, as you could end up with them messing something else up & blaming each other (that was how my MK4 died at the hands of two indy's not knowing what they were doing or making mistakes.)