PHH Mortgage Mortgage Complaint

PHH Mortgage Mortgage department,

Conventional fixed mortgage Loan servicing, payments, escrow account California

Our mortgage service company was changed from - to PHH. All of a sudden, we received their statement wanting for us to pay more into an escrow account. This is a big surprise. We never agreed on an escrow account. We have been managing our taxes and insurance by ourself and none was late or anything. We have not received any communication from PHH about what happend and why we must pay more into this new escrow account. We used to pay $2400.00 per month ; now they want us to pay $3400.00. This is a big increase we are not prepared yet. We are surprised at this escrow. We will call them ( PHH ). in the meantime, we want to pay the $ -/month. Is it OK? In other words, can PHH force an escrow account on us without our consent? Thanks for explaining to me why is this possible?