Product: Checking or savings account

A third person deposited a check in my account for {$30000.00} on Friday, XX/XX/2023. On Monday XX/XX/, when I reviewed my account I found {$9000.00} as AVAILABLE in my funds, I send a note to my bank manager asking about it because I did not know about partial payments, She told me that she was seeing the same, then on Wednesday XXXX XXXX XXXX in my account I saw another {$5500.00} available in my account. Again I called my bank manager and she told me that we can call to Customer Service to ask when the total money will be available but I told her that it was OK while finally the money will come to my account. As I was informed that FUNDS WERE AVAILABLE, I made one payment for {$9000.00} based on the Citibank information that funds were available. I have to say that I made payments using other bank account but confidence that funds were available in Citibank. To my surprise on Friday, XX/XX/, my Citibank accounts shows XXXX funds availability because the check was rejected. I call to the bank asking what happened and told me that theirs procedures allow them to put availability funds in my accounts while the check deposited is in process to be fully collected. 
I want to put a complaint to the authorities that supervise banks because Citibank has the following procedure : Check Deposit limits apply and vary based on clients tenure ( new vs. existing ) and banking segment. The current limits set on your account are in accordance with the terms and conditions governing your Citi International Personal Account Package. 
Deposits received before the end of a Business Day ( Refer to the Client Manual Consumer Accounts for definition of Business Day ) will be credited to your account that day. However, there may be a delay before these funds are available for your use. Depending on the total amount of your check deposits on any one day, the deposit amount may not become fully available to you until the fourth Business Day after the day of the deposit. 
Funds from all check deposits on any one day that total {$5500.00} or less will be available on the third Business Day after the day of deposit. The first {$220.00} of these check deposits will be available on the first Business Day after the day of deposit, an additional {$450.00} will be available on the second Business Day after the day of deposit and the remainder of the deposit will be available on the third Business Day after the day of deposit. If the total of your check deposits on any one day is greater than {$5500.00}, the amount in excess of {$5500.00} will be available on the fourth Business Day after the day of deposit. 
On XX/XX/, we received your personal check deposit in the amount of {$30000.00}. In accordance with the terms and conditions governing your Citi International Personal Account Package, the funds were available as previously described. 
On XX/XX/, we received a return of unpaid deposited check of {$30000.00}. Unfortunately, the funds were withdrawn from your checking account ending in XXXX 
As you can see the bank did not follow the procedure leading me to be subject to scam. Also they do not want to give copy of the checks either information anbout the accunt and company who deposited the check in my account because I want to sue that people for scam but bank does not cooperate giving the information. 
AS YOU CAN SEE CITIBANK DID NOT FOLLOW THEIR OWN PROCEDURE THEY PUT AS AVAILABLE TO MY ACCOUNT A MUCH MORE LARGER AMOUNT THAN {$250.00} OR {$450.00}. This mistake from the bak made me subject to scam por {$9000.00}