Clarification on Company's Request for Repayment
The question of the company's request for the employee to repay the money invested in them before their release is unclear. Are they asking for the salary or other expenses paid during your employment? What was the duration of your employment with them, and why do you wish to leave?
If you have any documents such as an attendance register, letters signed on behalf of the company, or any other supporting employment documentation, make photocopies and seek advice from a competent lawyer or solicitor promptly.