CCO Mortgage Review

I recently refinanced my house and choose CCO because of good rates and a recommendations of a friend.  I thought all was well until I received my monthly statement and noticed an increase of monthly payments by over $4,000.  After further review. my Escrow amount for estimated taxes mysteriously increased to $51,000 (on a house appraised at $200,000.)  CCO would not post my payment until I covered the estimated escrow amount.  It seems NO ONE AT CCO understood how the amount increased yet I had to cover.  I know have to go to my tax office and prove, again, that my taxes are not $51,000, even though they are the ones who made this error.  Everyone I talked to was rude and gave me little help or confidence.  TERRIBLE!!!!!!!!!