Hey man, I get it. You have every right to complain but I think they're inundated with work. Just a theory. I'm in the same boat but my tune is fine mostly.
To troubleshoot your issue in the meantime, try disconnecting the battery for 10 mins. See if that helps. If you have VAGCOM, try a DSG adaptation. If that fails, go to the last known good tune you have from them. If that won't work either, uninstall the AP which will effectively send your car back to stock. That will hopefully resolve your issue in the meantime even though the car will be slow. But like you said, you rely on the car.
Just trying to help out, that's what the forum is for.
Sent from my HTC 10 using Tapatalk