1. Since, you were not sent abroad for any knowledge enhancement to be required by the Company and for supervising the closure of foreighn facility, you can very well claim back the said amount if they dduct the same,
2. Collected the balance amount after they make the said illegal deduction and take te release letter,
3. After joining the new company, you claim your said deducted amount back on the grounds mentioned above,
4. First send them a legal notice to send you the amount within 15 days thereof and in case they fail or refuse to do that, file a Recovery Suit against the Company,
5. It will be very good but time consuming case to win.