Legal notice for disowning and newspaper publication

I took a home loan on a flat (loan in the name of me and my mother) and property was registered in my mother's name. My father did a shady deal wherein, he sold this flat to someone else and took part payment from the person and gave possession to him without my knowledge. He hoped that he will clear the loan and transfer the registry to that person but failed to do so. When I got to know about this deal, I stopped paying EMIsThat person has done cheating and cheque bounce case on my parentsNow the bank will take control of the loaned property and I am ready to give it to bank but the person is staying on that property is an old man with kidney disease and I am a little worried that bank may not be able to take possessionI want to prevent myself from any legal action from the bank and want to issue a legal notice to my father that he has deceived me and do a newspaper publication for disowning my parents. nnWhat is the approx cost to do this and can a lawyer here help?