Product: Student loan

I took several XXXX XXXX XXXX between XXXX. XXXXCitibank XXXX XXXX is not getting back to me via XXXX XXXX. I have called repeated times. They are overcharging me on interest. 

I am took out 3 loans from Citibank between XXXX and XXXX. 
Two of my loans were resold to XXXX XXXX XXXX and one was sold to XXXX XXXX. 

In my terms, I am to have : prime minus 1 % minus 0.25 % interest rate deduction because I am enrolled in autopay minus 0.50 % interest rate deduction because I made 48 consecutive monthly payments on time The XXXX is charging me 3 %, not giving me the 0.50 % due. If you look at my XXXX XXXX XXXX, I 'm being charged the correct interest rate of 2.5 %. I made my payments and there was a discrepancy with Citibank in XXXX, where their technology was clearly in the wrong that they reversed late fee charges. Unfortunately, they did not fix their technology algorithm to state that my payment was made on time. I had overpaid the month before and because I asked them to allocate the additional payment to the principle of a loan, when they made those changes, it " retroactively '' changed the payment amount. 

In any case, I spoke to a XXXX and XXXX from XXXX, and because they never returned my request, this complaint is against Citibank, cutting the middle man out. I have tried repeatedly to get in touch with Citibank, and even though their website is down, XXXX told me that Citibank employees with the student loan division still exists. 

From XXXX, I spoke to a XXXX, XXXX XXXX ID # XXXX ), XXXX, a XXXX, a XXXX XXXX ID # XXXX ), and a XXXX XXXX ID # XXXX ) and an XXXX wrote to me. I had spoken to XXXX last ( mid-XXXX XXXX ), and told her that I had all my bank transactions and received the letter from XXXX, to which she told me to disregard XXXX 's letter, and not to send in the bank transactions from XXXX. She told me to wait, but I have n't heard from her and it has been well over a month. This has been ongoing since XXXX XXXX, and now it is XXXX XXXX, and has not been reconciled. As you can see from another letter that is attached, they make these errors, and do not correct their errors on behalf of students accounts, therefore removing any types of benefits to the student. In the most recent invoice, Citibank/XXXX is charging me 3 % and in another within a month 's difference, they are charging 2.75 %. They need to match the same interest rate I 'm being charged at XXXX, 2.50 % because all the loans were taken by the same lender and under the same terms. 

I also am attaching a link to the images of checks or check transactions by Citibank from my bank statement for the year of XXXX, because I can not exceed over XXXX of attachments here ( XXXX images ) : XXXX XXXX XXXX  XXXX From Citibank, I spoke to XXXX XXXX ( located in XXXX, ID # XXXX ), who logged my complaint # XXXX. I would like for Citibank to investigate and retroactively reverse the extra 0.5 % that they charged me since XXXX and apply that to the principle of my current loan, and charge me the correct interest rate of 2.5 %. Attached are my loan terms and checks to Citibank in XXXX. I also had filed a forbearance, but in the terms, forbearance does not affect the benefit of 0.50 % interest rate reduction for 48 consecutive monthly payments on time.