Product: Checking or savings account

I do have banking accounts ( checking, savings IRA ) at Citibank branch XXXX in XXXX XXXX, NY. I am a XXXX customer for over 30 years but only after my retirement I found time checking and verifying irregularities on my accounts. 

I would like complaining on the followings : 1. Citibank unfair practice of providing selective interest on saving accounts in a way that benefits the bank only. 
a. I have 4 equal saving accounts same amount in all 4 accounts, all accounts opened the same day by the same bank agent at the same branch. 
b. I discovered that one account, XXXX gets a consistently higher monthly interest than the other accounts. I Contacted my account manager in early XX/XX/XXXX but so far, the discrepancy between the interest continued. See below the situation XX/XX/XXXX to XX/XX/XXXX with a gap of {$78.00} in my disadvantage. 
Account Ending & Monthly Interest Difference in Month XXXX XXXX XXXX XXXX XXXX Bank 's advantage XX/XX/XXXX {$16.00} {$16.00} {$16.00} {$24.00} {$24.00} XX/XX/XXXX {$15.00} {$15.00} {$15.00} {$23.00} {$23.00} XX/XX/XXXX {$16.00} {$16.00} {$16.00} {$24.00} {$24.00} XX/XX/XXXX {$22.00} {$22.00} {$22.00} {$24.00} {$5.00} TOTAL {$78.00} SUMMARY : I would appreciate your investigation into the above banks business practice and letting me know. 

2. Citibank of unfair practice of rejecting wire transfers in order to charge fees and poor customer service a. I am using my checking account for DBA as XXXX XXXX XXXX XXXX for more than 7 years. I have records showing that from XX/XX/XXXX through XX/XX/XXXX, few companies, from XXXX, XXXX, XXXX and XXXX have wired money to may accounts. All wire transfers have been processed without a glitch. 
b. In earlyXX/XX/XXXX, the same XXXX company that successfully wired the last transaction on XX/XX/XXXX, using the same template with identical SWFIT/ABA, account # and name had the transaction rejected by Citibank and very high fees were imposed by both Citibank and XXXX XXXX XXXX for processing the rejection. 
c. My inquiries with Citibank were focused on the followings : i. Why the bank didnt inform me of rejection of the transfer ii. What is the reason for rejection of the transfer d. During long phone calls with the bank, I got many contradictory excuses but not one that makes sense to justify the rejections of two wire transfers and the refund of fees charged. 
e. Upon written insistence and many phone calls, Citibank appointed on XX/XX/XXXX XXXX XXXX XXXX to investigate the reason for rejection and respond in writing. No feedback was received until I followed-up on XX/XX/XXXX. At that time, I received instead of a reply including 8 messages, detailing all my accounts activities from XX/XX/XXXX to XX/XX/XXXX but no other answer why the bank rejected the wire transfers nor any feedback of refunding the fee. 
f. Beside the fact that Citibank violated my financial privacy by researching my banking accounts, no coherent explanation on the rationale of processing about 15 wire transfers without a glitch while suddenly rejecting one from a known and recurring sender with identical instructions. 
g. Citibank demonstrated a very poor customer service, providing conflicting excuses and refusal to provide written documentation for the wire transfers rejections while unfairly charging fees.

h. I doubt that by cutting and reducing customers service Citibank improves satisfaction rather than boosting its profits. Certainly, finding new excuses to charged fees certainly contributes to the banks profitability on the back of its customers. 
SUMMARY : I would appreciate your investigation into the above banks business practice and letting me know.