If I'm Tang's agent I'm ignoring all calls from KState and only calling back if the messages are in regards to paying the full buyout, all the time telling Tang to keep his f'n mouth shut about everything expect coaching basketball games.
I was part of a work situation where something similar to what you described happened. A guy was getting laid off and hung up on HR and said they should only talk to him through his attorney. This wasn't some scandal where the guy broke company rules or anything, just a typical layoff. The guy made it very entertaining for those of us on the leadership team.
He managed to turn his layoff/severance into a firing with lawyers involved. No longer in the industry. I hope the same doesn't befall Mr. Tang.