Product: Checking or savings account

I did a dispute on XX/XX/XXXX for unauthorized debits into my M & T Business Bank account. The next day on XX/XX/XXXX the M & T Bank posted into my account a provisional credit of the disputed amount. ( As a reminder, the provisional credit is made available for the customer to be used while the investigation is underway ). On XX/XX/XXXX, I wrote a check to be cashed into my M & T Bank account, but the check was returned as unpaid. I contacted the bank over the phone but was told to step into a branch for clarification. Once at the bank, nobody was able to tell me exactly what was going on except that I can not have access my account, let alone having access to my money and/or the provisional credit that were into my account. A banker that same day told me that he thinks the bank is going to deny my dispute that is why they do not want me to have access to the account ( PROFILING ). This is only happening 2 days after filling the dispute ( VIOLATION OF MY RIGHT ). I was later told by three different bankers that the account was under review and that M & T Bank has up to 21 days to complete their review before I can get access to both the account and my money. After the 21 days passed, I was again told that I can not still have access to my account and that M & T Bank has now up until 30 days to complete the review. ( DOUBLE STANDARD AND LIES ). 
Today, after more than 30 days, I have received a letter from M & T Bank saying that indeed they are denying my dispute without providing ANY REASON and adding that the bank gave me full use of the funds related to the disputed item while they were investigated the claim. ( LIES, LIES AND LIES ). The letter is clearly contradicting every single action that the M & T Bank took while investigating the claim. ( REVOKING THEIR APPROVAL FOR DEPOSIT INSURANCE ). 
As a customer I do have my rights and obligations so does M & T Bank, however, not only I was being profiled by the bank but also, I was deprived of my rights and was discriminated against. 
1. How the banker knew beforehand that the M & T Bank was going to deny the claim just after I filed the claim? ( premeditated and profiling ) 2. Why M & T Bank is denying me access to the provisional credit while they are investigating the claim? ( violation of my rights ) 3. How does M & T Bank decide to change their review process from up to 21 days to 30 days? ( double standard, discrimination ) 4. How come M & T Bank is unable to provide reasons/ proofs/ evidences to deny the claim? ( premeditated denial ) In any case, the M & T Bank must inform customers of the reason for the review and the timeframe for resolving it. M & T Bank should also give the customers access to their funds as soon as possible. 
M & T Bank has not acted fairly and reasonably in reviewing my account with the help of unqualified employees and the Federal Deposit Insurance Corporation ( FDIC ) should revoke their approval for deposit insurance because they have not followed the proper protocols while handling my claim. Also, I am protected by the Zero Liability Protection. 
Finally, Unless M & T Bank provide concrete evidences, the Consumer Financial Protection Bureau must take action to make sure that I am protected from those unfair acts and practices. Also, I advise M & T Bank to SETTLE the case now rather than later.