I’d call the bank and tell them you’re having trouble contacting the listing agent but most likely the bank is a giant corporate machine and the listing agency is the bank’s “cog” for sending “prettified” package numbers out. Imagine the bank’s liability if they send you information that was not available to the general public through the listing agent.
So you will probably be referred back to the listing agent for the “package” but maybe you can get some ballpark numbers from the bank officer (like how much is owed).
On the other hand, the other agent in the listing agent’s office is not your “buyer’s agent” do not make the mistake thinking that they are looking out for you. They’re in cahoots with the listing agent and the bank. On the bright side, they can probably obtain the “package” and give you a copy of it (after you sign nondisclosure agreement).