The auction starts:
At his turn to call, West thinks for a few seconds and then informs North/South that he should have alerted 2♦. He explains that 2♦ is a transfer to hearts.
The TD is called by North/South. South says that, following the change of explanation, she wishes to change her call. East waves his arms vigorously and asks to talk to the TD in private. The TD refuses this request and asks East to keep quiet.
The TD allows South to change her call. She withdraws her 2♥ bid and changes this to a pass.
The TD instructs the players to continue with the auction. West now passes as well! North protects with a "take-out" double, which South removes to 2♥ and all pass.
So the final auction was:
South makes 10 tricks in 2♥, N/S +170.
N/S call back the TD, expressing surprise about West's pass over 2♦ and claiming that both East and West are in possession of UI.
How do you rule?