Product: Bank account or service

On XXXX, I deposited XXXX XXXX party checks ( {$4400.00} and {$1800.00} ) into my Bank of America Savings account via ATM in XXXX, NY that was signed over to me by my father, XXXX XXXX. The next day, the amount was reversed out of my account. I contacted BoA and was told that they do not honor XXXX party checks. I was told that the original or legal substitute copies would be returned to me via mail within XXXX to XXXX business days. 
I spent XXXX weeks in NY caring for my father, who was hospitalized because of a XXXX XXXX and XXXX. Upon my return home to XXXX there were no checks from Bank of America. I waited another week to contact them regarding the checks. I went online to the banking center and was told to go into the branch. I went into my local branch and was told that they could not assist me that I had to contact the XXXX number. 
I called the XXXX on XXXX XXXX, spoke with a supervisor, and explained what happened and what was needed. He put in a request for the original copies or legal copies to be mailed out to me. About XXXX weeks later, I received photo copies of the checks. I contacted customer service again and explained that I received photo copies and not legal copies. At XXXX point, the representative tried to tell me that the photo copies were legal copies until I told her that the letter stated that they were photo copies and that there was no legal verbiage on the checks, indicating that they were legal copies. 
My complaint was escalated to have the legal substitute copies mailed out to me asap. I received a call the next day to contact customer service ( escalation department ) because they needed additional information. When I contact them, they inquired if I could have the original vendor stop payment on the checks and reissue them. I told them that that was not an option since the original checks were issued to my father who, was not in any condition to handle any business affairs. A second request was put in for the substitute legal copies of the XXXX checks. 
On XXXX, I received photo copies of the checks again. I contacted the escalation center for BoA where I was told that they could not produce the original checks or legal copies of the check. I was told that they use a third party company and that each time the request was put in, it was denied, but there was no explanation. I told the representative that I have no way of having these checks reissued and that I could not eat {$6300.00} because their XXXX party vendor could not produce checks, that were supposed to be sent to me within 10 days of deposit. The request was escalated to find out why the third party that produces the legal checks could not issue them. 
I no longer have trust in Bank of America. It is now two months later, I have been given so much misinformation and they will not return over 6K worth of checks to me, as their policy states. I understand that they will not honor third party checks, however, return the legal copies ( or original copy ) to me and allow me to have another bank honor them. I need some assistance in getting these checks back to me. 
Below are reference numbers for my case throughout this XXXX month XXXX - XXXX XXXX - XXXX XXXX - request to find out why the XXXX party vendor will not send legal copies of the checks