Nationstar Mortgage Mortgage Complaint

Nationstar Mortgage Mortgage department,

VA mortgage Loan servicing, payments, escrow account Texas

I have a loan through Nationstar Mortgage, I have automatic payments of $1900.00 a month that pays automatically every month. In early - I received a call from Nationstar rep stating that my payment was short by $120.00, I asked why and they stated that escrow analysis showed that there was a shortage. I was not notified about this by either phone or email. I asked the rep why my payment has increased by that much when my insurance premiums went down and the county tax had not increased. The rep could n't tell me and told me to call the escrow department. I called escrow and asked the same question, they put me on hold for almost an hour and I finally had to hang up. I called the next day to complain and asked to talk to a supervisor, they never called me back. Now I received a letter from them stating my loan is in default. I been trying to get answers from them about my escrow for over three weeks and still have not gotten a response. Can you help?