Regarding 20rupee bond issue money dispute

As I running my own company in chennai.. Recently I signed the 20 rupee agreement that I borrowed 15 lakhs from financier. But financier send me only 7 lakhs through bank. Balance 8 lakh was not credited to me. When am asking these, he say u sign a bond so am going to put a suit case for recovering 15 lakhs. I panic.When it was happening another shock is waiting for me from the bank. The bank says someone put cheque for the amount of 2800500 in [deleted].But before one month I noticed that my 2 cheques are lose from me. And I don't knew where it gones because am a proprietor of company so I signed my company current cheque and have it in my company. After I understood that my company advisor and financier were close friends. My company advisor stolen my cheque and handover it to the financier.. Now they are threatening me to gave me a sum of 28 lakhs rupees. Otherwise we'll make case in high court and recover the 28 lakhs, like wise they are saying. But I stopped cheque in date of [deleted] and I gave online complaint to [deleted]. So please gave me a legal advice and what step to be taken next.. Thanking you.