Product: Checking or savings account

On XX/XX/XXXX, I opened a checking account in the Chase bank at XXXX XXXX branch in XXXX, Georgia. It was a checking deposit of {$50000.00} I received a call from the branch telling me that their superiors in XXXX, Ohio want me to call them so that they can validate and verify the cashier check that I deposited. I called them and they asked me for a telephone number of the XXXX bank that issued the cashier check. I called the XXXX bank XXXX XXXX XXXX ) And I got every telephone number they have in the XXXX XXXX XXXX. I called back the customer service of Chase ( XXXX ) XXXX for more than three weeks almost daily giving them different numbers of XXXX, they always said that it was not the number they are looking for the validation. I started stopping by the branch almost everyday talking with the people of the bank who tried to call to help me by calling their superiors in Ohio to resolve the problem. The Chase officer at XXXX XXXX provided their superiors in Ohio with whatever I had as documents of confirmation and validation of the cashier check such as my checkbook from Multibank, account balance from XXXX that shows the cashier checks discounted from my business account, the stubs of the cashier checks, and " payment promise '' from Multibank stating that they are paying my business account over {$760000.00} for the sale of a property. Every time we presented a proof they would change their mind and ask for more proofs until we ran out of proofs I talked to XXXX XXXX XXXX in XXXX where XXXX has their account from which the cashier checks where issued and the officer of the XXXX XXXX XXXXXXXX assured the officers of Chase branch at XXXX XXXX that the checks were good, as a matter of fact they were cleared and cashed by Chase at that point despite the fact that the chase sent me a letter informing me that they had closed my account on XX/XX/XXXX. They then sent me a checking summary showing that deposit of {$50000.00} and at the same time a XXXX check charge of $ XXXX leaving an ending balance of {$0.00}. 
I have been talking to their branch at XXXX XXXX since late XXXX and they haven't done anything in this regard. 
Lately and precisely the XXXX of XXXX, XXXX I finally received a letter from Chase Branch Complaint Escalations signed by XXXX, XXXX XXXX XXXX called her the very same day and talked to her for approximately half an hour, she was surprised that I had not received my money back and she told me that she was going to investigate my case. 
I asked her about the time I can call her back she replied that I can call her back Friday XX/XX/XXXX and if not Tuesday the XXXX for sure. I called her XXXX times on XXXX the XXXX without any response and left her a message. 
On XXXX the XXXX, which was yesterday I called her XXXX times without any response and left her a couple of messages. Today XX/XX/XXXX, at this point at XXXX pm I called XXXX XXXX XXXX times so far and left her XXXX messages, both in XXXX and XXXX. 
So far I have not received any response and I always hear the same recording that she is not available and that she will call me back as soon as she gets my message. The checking summary shows a debit DDA of $ XXXX that I never authorized. This kind of abuse that the bank has done to me is affecting me XXXX XXXX XXXX XXXX XXXX XXXX XXXX. I am a XXXX XXXX years old with XXXX, XXXX XXXX and as a result of this plight with Chase bank my XXXX are getting worse. They are holding my money without any credible reason and unfairly.