Last Company not settling my previous dues

Dear sir/Madam, I was working in private company in chennai last year. I joined that company on Aug 2016 and served my 2 months notice period and also gave my resignation letter on Nov 2016 after working and serving the notice period. The company took 4 months for preparing my full and final settlement sheet and after that I thought they will give my cheque immediately as the sheet has been made ready. But when i asked Human resource department they said it has gone for approval in my previous company head office which is located in Bangalore. I asked the duration that can take but my HR said that how can I ask this to head office like that. I also informed that i need my settlement cheque immediately as it was required for me on urgent basis. My previous company HR not responding all to my mails and when i go to my previous company they are not even explaining me properly. So how to solve this and i want my cheque immediately Please help me