A former Meta executive who wrote an explosive exposé making allegations about the social media company’s dealings with China and its treatment of teenagers is said to be “on the verge of bankruptcy” after publishing the book.

An MP has claimed in parliament that Mark Zuckerberg’s company was trying to “silence and punish” Sarah Wynn-Williams, the former director of global public policy at Meta’s precursor, Facebook, after her decision to speak out about her time at the company.

Louise Haigh, the former Labour transport secretary, said Wynn-Williams was facing a fine of $50,000 (£37,000) every time she breached an order secured by Meta preventing her from talking disparagingly about the company.