Product: Bank account or service

I, XXXX XXXX, have been receiving numerous emails from Gold Delta Sky Miles Credit Card, offering : XXXX bonus miles, check your first bag free on every Delta flight, and priority boarding. My husband and I do a lot of traveling, so I thought that I would take advantage of it. I filled out the application on line and emailed it to American Express. 
On XXXX XXXX, 2016, I received an email back from American Express, saying that they received my application. Ref : XXXX On or about XXXX XXXX, I received a letter from American Express, advising me that they need a letter from my Banker stating that I do business there. I forwarded the information to my XXXX and he wrote up a letter advising them that I do business there and signed it. I sent all the information back to American Express. 
On XXXX XXXX, I received another letter from American Express, stating that they were unable to confirm the signature of the verifying official and can not accept the information received. Please ask the individual who signed the letter to contact American Express from their place of business. I immediately went down to my Banker and gave him the letter which I received from American Express. 
My Banker, XXXX XXXX, XXXX Private Client XXXX He placed the call on Speaker so I could hear. 
He spoke to a XXXX, who advised my Banker that my XXXX XXXX address has a lot of FRAUD! He also wanted to know why my Banker did not send my account balances. He said normally all Bankers do. 
Then he advised my Banker that the phone number from the Bank, was not the same number he was calling from. When my Banker asked XXXX what number does it show, XXXX said he could not reveal the number. None of this made any sense. My Banker called a second time and spoke to a female. She advised my Banker that the number is incorrect. My Banker asked to speak to a Manager and was placed on hold for 10 minutes. My Banker hung and called back and again was told by another representative that the number he is calling from does not match the number he gave them. My Banker was advised to send another letter. They requested a proof of address which we already provided but were unable to confirm his signature. ( so they say ) AMEX has requested that the Banker call and confirm his identity, which he attempted to do but was unsuccessful due to a discrepancy in the phone number, which they say they have is different. He faxed all this on XX/XX/XXXX. None of this makes any sense!! 
When I returned home, I advised my husband that the representative from American Express, says that there is a lot of fraud at this address. He called the XXXX number with the Utah address and asked to speak to a Manager. He spoke to a XXXX XXXX, and she advised my husband that the Rep never said that ... ... .. 
She advised my husband that she needs a correct phone number from my Banker! 
My husband asked XXXX what phone number was he calling her from and she said she didnt know! 
This makes no sense!!! Why are they lying about the Bankers phone number!! This is so irrelevant to the matter. 
My husband asked to speak to another Manager and XXXX said she would have one call us back. We are still waiting for a phone call from another Manager.. 
I feel that AMEX is discriminating against me because I am an older female!! 
I truthfully