Did you obtain something in writing from Chase bank? Otherwise, Chase is allowed to sell it to any other company and this new company does not have to agree to Chase's offer unless it is in writing. Seek a mortgage defense lawyer for further advice.
The hiring of an attorney is an important decision that you should undertake with careful considerations. The use of Avvo, Inc.'s question and answer forum is only to provide general information and in no way forms an attorney-client relationship between the you and the attorney answering your question.