forgery signature of co-borrower on loan document and loan agreement

Iam Dhiraj kumar having a personal loan of Rs 1216700 from Kotak mahindra bank. Due to job loss i was unable to pay next 2 month EMI after moratorium end. Few days before kotak bank employee called my father-in-law and told that i given his contact as reference which is totally wrong also told that my wife is co-borrower in that loan. Later i checked loan agreement with bank and observe that in co-borrower section my wife signature is present but my wife didnt sign any document. Also bank has asked my wife aadhar card and a photograph by saying that these documents are needed for KYC as i opted my wife as a nominee in policy (policy provided by kotak bank while availing loan and is part of loan amount). Earlier bank sent me a email asking for some detail with some term condition in which it was stated that wife should be added as co-borrower. As it was on my official email so i didnt check it well and delelete email soon after sending email. Now iam completely trapped by bank.