JPMorgan Chase Mortgage Complaint

JPMorgan Chase Mortgage department,

Conventional fixed mortgage Application, originator, mortgage broker Georgia

I am in the process of buying a new home. I had a foreclosure several years ago. My lender has requested a satisfaction letter from Chase Mortgage.I called them on - - and requested the document and was told it would take between 5 and 15 business days to get the letter. As of today ( - ), I can not get that letter I need and now I ca n't get anyone to call me back. I already lost one house and had to eat the inspection fee and the appraisal fee because of this missing letter. I have a new house under contract and need them to provide the letter immediately. I am at their mercy right now and I need help.