Even in the wild tech start-up scene, Adam Neumann stood out as a quirky, self-obsessed maverick with a reckless streak.

Which goes a long way in explaining why the current management at WeWork Inc.—the company Neumann built into a $47 billion real estate powerhouse before he was pushed out and it fell into bankruptcy—isn’t eager to pick up the phone when he calls to do business. Neumann wants to slide WeWork a slug of cash to help it pay leases and legal fees and avoid liquidation—a move that, if accepted, would effectively put him back in control of the company he co-founded.

Some two months have gone by since Neumann first reached out to WeWork and, his lawyers contend, he’s still waiting on the necessary facts and figures to fine-tune and finalize his proposal.

“We write to express our dismay with WeWork’s lack of engagement,” Alex Spiro, an attorney representing Neumann, told WeWork’s lawyers in a letter.