need to file a wrongful business practice suit . Defendant is bank in RI I live in Boston. what court?

I want to file a wrongful business practice suit against a bank in Rhode Island. I live in Boston. What forms do I need to complete and what court shall I file this in?
This bank forced me to refinance my loan with another bank and gave them false information about by ability to pay it back in order to get the loan off their books. Now i in danger of loosing the biusiness and the house used as security