JPMorgan Chase Bank Account Or Service Complaint

JPMorgan Chase Bank account or service department,

Checking account Making/receiving payments, sending money California

I made a purchase of a cashier 's check from my bank account on Chase by -/-/2015 to pay my move in fees in a new apartment located at -. The amount debited from my account was US $6400.00 and the check number was -. On the other hand, last friday -/-/2015, I received a 30 days notice to vacate the premisses because the landlord told the check was fraudulent. I went to speak with the representant by the lease office and she told me the amount on the check was different than the amount generated. I went to Chase and the banker told me a problem happened and would take up to 10 business days to send the money back to my account. This is unreal and now not only my reputation but my integrity are burned in the building I just moved. By the lease office, the lady told me they could n't even deposit the check. I need a solution ASAP.