You can provide as much "evidence" as you want. Your broker can do exactly nothing with evidence. Brokers do not transact on "evidence". They transact on shares.
Listen, even if your broker completely agrees with you, they still require actual shares to release any funds being held. And if they do not have any in their inventory, the must get them from actual shareholders. They can't just steal them, they must now wait until shareholders voluntarily forfeit them. The broker can leave the stuck short position open indefinitely, it's just numbers on the screen. As long as the stuck short investor is willing to pay the fees, they can let it sit there forever. Those numbers will not become "real" until there are actual shares available for those investors to buy back and close those positions.
But what is real are those fees.
Nevertheless, feel free to continue to argue that brokers (or investors) do not require actual shares in order to engage in a legal transaction. And in this case we are specifically talking about positions (long or short) that were open when FINRA suspended the CUSIP in November of 2019.
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