Does section 499 and 500 IPC apply to banks

So my father took a small amount of load arpund 3 lakhs in 2004, after which due to some financial crises, about 150k was left out... We also had other loans as we moved on in life, i was about 6-7 yrs old.. He repaid all loans except this one, we also sold our house for it, first they use to call, send people at home, but we knew the mistake was ours we didnt pay, in 2008 they started harrassing our relatives and neigbours, due to which my father got angry and decided to not pay the loan, and let their be a case on him. But they use to thretan us but never filed a case. We went to complain to police, the office had a call and than they stopped. In 2011, they again started with the same, the identity of these people is always misleading n confusing, this time after sending goons and complains, 2 nice professionals came and had a talk, he and my father agreed on a amount. They asked us to pay a certain amount every month, so that it shows he is interested in settlement and than they shall send a letter. My father paid 60k in 3 months and tried to reach out people for the letter. But they vanished away. In 2015 they started harrassing me, and neighbours and my friends too!, we also had recording of their abusive language and they threatened my father to suicide or they will keep defaming him. I went to a bank branch had a talk, this time the amount was 10 lakh+ and they woshed to settle at some 7-8 lakhs... The amount was hipped, they again had a bargain. This time we were scared, felt like extortion, we went to police, they again had a call, and all went calm, we mailed to the bank, copied it to police, rbi, bank chiefs and sent it. Now again in 2017, I just started a job, they didnt nly harress me, but they also went to my pg and harressed those people, defamed my father as a goon who ran away. Even though we have proofs that he was answering calls, we have sent our updated address to them and we are talking to them. Police asks to settle with the bank. We are ready to fight a case if they fill against us and have mentioned it in many mails, all we asked is instead of such communications, please have written communication as we cannot record their abuses everytime. Now they are defaming me and my family to my social life and family life. The pg owner was scared and crying when i reached home. Now I also need to find a place in a week.