Nationstar Mortgage Mortgage Complaint

Nationstar Mortgage Mortgage department,

FHA mortgage Loan servicing, payments, escrow account New York

My mortgage company ( nationstar ) is telling me that I am short over $5000.00 in escrow. I asked where did all the money you collected from me for escrow go? Keep in mind the increase in taxes and home insurance is only $29.00 from last year. They are raising my mortgage payment over $440.00 a month with less than 30 days notice. How is this my dilemma? How do they allow such a shortage. I asked if they can provide me a breakdown of where my escrow payments went and they said they could not provide it. I pay extra every month and to be told I am over $5000.00 short doesnt make any sense. Also When they first took over my loan I owed $370000.00 I paid for several months and all of a sudden I see that what i owed increased instead of decreaased. I do not trust this company. Please help me correct this.