I don't know what size bank you are at but if its less than 500 million Go to the banks Credit Administrator or Senior Credit Officer and tell them your story. They will take it from there.
Over 500 million in size some banks have regions and regional credit managers.
Don't even try and get satisfaction from the loan officer. Take this to the banks senior management. You have a real problem as it sound like your word vs his word.
If no satisfaction you can file a consumer complaint with the banks regulator. You can also take legal action but based on what you have stated not much of a case with no proof.
_________________________
HMDA Fair Lending/CRA Analysis,Assessment Area Maps,Geocoding,Demographic Analysis 800-995-5448