No Definite Intimation when the Full & Final Will be released_Legal Advice Required

Hello Legal Expert, I have left my previous job from an International organization (India division) after serving an agreemented notice period of one month. All the handover & other official formalities have been done and I have received my relieving letter also. Per HR policy, FnF was supposed to be released on the last day of work. But it's not happened. From Aug'17 there is no payment done from the company, so clubing all pending payments, the full and final settlement amount is INR 123980/=. Indian Operations HQ is in Gurgaon and I was based at Mumbai during my tenure with the company. It is 52 days over from my last working day. After a series of follow-up with Indian Management as well as HQ : Hongkong Management (HR), a partial amount of INR 52 K has been released yesterday. And shown the delay reason as the financial crunch of Indian operations. Now while I am again asking for a definite timeline for rest payment (INR 71,980) clearance, the same excuses are being exempted & clearly stated that when the financial position will be up then the payment can be made. And that is also not definitely defined (tentative date). Looking forward a legal advice how I can get my Rest FnF earliest. Thanks, Saptarshi