That's all you had to do to buy some when the window was still open. That's all you had to do.
But the window is now closed. That's how Schwab works, they are a little slow getting newly-minted CE's entered into their system, but they do eventually.
Next time just open Schwab and click Buy while you still can. Imagine the glory of owning more TXTM instead of wasting time on the phone listening to what the policy is supposed to be.
I've seen this several times now and it still blows me away that someone without an account and that has never tried it argue with me that an order cannot be placed even though I can place an order right then and there with my open account.