Fina Elsaadany review: Mortgage Company

My mortgage went from Chase to Nation Star Mortgage and I want to file a litigation on the bank that bought my loan

Call me direct with information on what I can do with this situation

I am on the mortgage and I have somebody on the deed that doesn't live in he home anymore. My credit is score 600
Damage of credit, interest rate of 4.5% payment is $3, 200.00