Will my green card application be in trouble if I report an illegal activity of paying H1B expenses by my ex employer?

I came to USA on H1B visa. My company A sponsored my visa but took from me h1b related expenses of around $2000 through it's sister company B located outside USA through my savings bank (outside USA) account. I have gotten the emails which says the company wanted me to pay h1b expenses. I also have my savings bank passbook which shows the account number shared to me by my ex employer and the amount debited. Now I have left the above employer and working with another company who is going to start my green card process. If I report the above illegal activity of my ex employer, will my green card process come into trouble in the future since both are immigration issues? Will USCIS hold me responsible for paying the amount from my pocket and take actions like deportation, blacklisting of my profile in the US?