Problems with previous employer

I was working in a pvt Ltd company in Pune since April 2014. The company is a service provider for safety testing of electrical and electronic items. They had a 3 years bond signed by me which was of 1lac rupees. They also took my original documents. In November 2015 they sent me to their sister unit in new Delhi for some work and told me that they are planning to permanently transfer me later. They finally transferred me in February 2015. At the new office I started having some serious issues with the management which didn't seem to be resolved so I decided to resign. I got selected in another company and finally resigned. The new employer asked for acceptance of resignation, relieving letter, experience letter, salary slip. So still in my notice period, I asked the same to HR. But they denied everything saying paperwork of your transfer is not done hence you're not an employee of this company so we cannot accept the resignation. So I contacted Pune office, they told that you've been transferred to Delhi so we can't accept your resignation. So I emailed the resignation letter to both offices. I felt that they are doing the same thing in providing other documents also even though I was ready to pay the bond amount. They hadn't provided me salary slip since November 2015 and salary since March 2016. I resigned in April with one month notice period. Having failed in getting the required documents I fabricated a salary slip in which I mentioned an increased amount (since April was annual increment month so I mentioned the amount which I was supposed to get after the increment) and submitted it to the new company. About the other documents I somehow convinced them to submit later. Within a month of joining the new company, they sent an enquiry to my previous company and found that the salary slip was fake, so I had to face some consequences, which I deserved. But now the matter is solved here. But my ex employer still have my original documents and I have tried to contact them so many times, saying that I will pay the bond amount, release my documents. But they are ignoring my emails and calls. One day I succeeded to talk to HR and he asked me to come to Pune for final settlement so I asked him to provide me an email stating that the settlement process will be over in 1-2 days so I won't have to be absent from the current work for long, but he refused. I feel that all they want is harass me. Also threatened to take action against me for making a fake salary slip in the company's name. Please guide me, what should I do? Thank you.