I am working in a reputed Indian MNC for past 1 year and despite being from IIT Roorkee, I joined such a service company just coz they were starting a new unit and wanted IITians. Just lured by the great learning opportunity as it sounded, I joined the company. Later on realised the ugly truth of all the lazy management and lack of planning going on within. They even transferred me but still no work or project was given. After 1 year of lull period, I decided to move on and resigned. At the time of resignation, I had no pending assignments or dependencies. Now according to my offer letter I can be relieved before 3 months of notice period if I have no pending assignments or I can pay equivalent salary, on the discretion of management.
Now, my resignation has been validated by HR, approved by my immediate manager but my Unit Head is not approving it. I might lose my new offer because of him but he's not letting(relieving) me go. He's neither letting me buy out the notice period nor letting me go otherwise. I can't sit for 3 more months without any work. My career is getting spoiled. Kindly suggest what measures I can take to go from here and join my new employer at the earliest. In no way I can delay my joining at new employer's for more than a month. Kindly show me a way out.