Cheated by loan company higher interest now harassing to pay it

 I have taken personal loan from bajaj at ROI 13.25 and giving the confirmation for same but they cheat me and sanctioned my loan with ROI 15.25 and deducted my emi 4257 instead of 4057 for that I paying regular EMI 4257 and file complain to grievance and almost 12 month is over no action taken by her side in this month I missed my emi due to some financial issue and right now her collection person pressure me pay your emi after that I say that my emi is 4057 I will pay this EMI as due and what is u deducted extra adjust for this time but deny u have to pay what is emi then I ask can him to show doc in which I sing or confirmation email for ROI 15.25 but they deny not showing since last 20 day and continues harnesses me and told u have to full pay emi otherwise I can do u don't think for this today they call me office by saying we resolve the issue when I reached his indore office they covered by 5 person and give the harnmess word u have to pay otherwise u suggest what I can do?