What needs to be done

I took a loan of 8ok from Kotak and I was paying my loan at the right time. I changed my company and my salary account got changed. One day I received a message saying I will be charged as salary is not getting credited. I rushed to the Bank from where I took the loan. me: can I get an account where I can transfer the loan amount? Exec: No Exce: Try to change it to saving by depositing 10k else go for ecs. Me: I will go for EMS Exec: Bring two cheque leaf of HDFC next Saturday. I went and they were like, we can't help you and I need to go to Kotak house. Next Saturday, I approached Kotak house people and they were like, you need to reach the branch from where you took loan. I was annoyed and I stopped contacting them. one day I transferred 9k to my Kotak salary account, they blocked 1500 and on reaching they were like sir you could have gone for Naïve account where you could have deposited 5k. I was like you could have informed this earlier. I stopped paying my loan and I asked them to refund the money as it was not my fault. Two days back, I started getting threatening calls. He went personal and abused me. he used bast***, Son of b****, you eat my sh***. Could you please help me , what needs to be done?