Product: Credit card

To Whom It May Concern : I am writing this letter to dispute a billing error on my credit card account in the amount of {$150.00} in the form of additional interest from BBVA, the bank card issuer. This charge appeared on my billing statement, dated XXXX/XXXX/XXXX. I have enclosed a copy of my billing statement with the disputed charge circled. 
This charge is inaccurate because on XXXX/XXXX/XXXX BBVA incorrectly assigned my account a {$27.00} returned check fee for a electronic funds transfer from XXXX bank ( CFPB can corroborate this as fact via XXXX previous case number : XXXX ) On XX/XX/XXXX my checking account at XXXX had a balance of {$2000.00}. On XX/XX/XXXX I initiated a pull payment via the BBVA website in the amount of {$2000.00} out of my XXXX checking account into my BBVA compass account using the account and routing #. The payment was properly credited at BBVA Compass on XX/XX/XXXX. 
However on XX/XX/XXXX a full six days after BBVA credited the payment the following transaction details appeared in my BBVA account Description Debits XXXX/XXXX/XXXX XXXX/XXXX/XXXX RETURNED CHECK FEE {$27.00} XXXX/XXXX/XXXX XXXX/XXXX/XXXX PAYMENT REVERSAL {$2000.00} Despite the fact that my XXXX checking account had the funds ready and available at the time of transfer. Due BBVA being the causation of the {$27.00} returned check fee, combined with my lack of any type of notification of any restriction imposed on the use of the funds in my checking account I requested that BBVA credit my account for the error and BBVA verbally agreed to correct and reverse the {$27.00} charge shortly after it appeared on my account, however curiously BBVA waited until XXXX/XXXX/XXXX to effectuate this reversal of the incorrectly assigned {$27.00} returned check fee. I took XXXX 's word that they would expediently correct the {$27.00} charge and paid my entire balance but for the {$27.00} moreover I needed to call BBVA no less than four times and wait almost 2 full statement periods to get this {$27.00} error reversed. Fast forward to the XXXX/XXXX/XXXX statement and the {$150.00} interest charge arrived on my statement that had otherwise been paid in full before the statement close. I called BBVA to inquire as to how they reached this conclusion on the daily compounded interest calculation however they have refused to provide me with a detailed computation breakdown of how they arrived at the disputed interest charge of {$150.00}. 
Under the Fair Credit Billing Act, I am requesting that this billing error be proven, validated and corrected and any finance charges and fees associated with the disputed charge be credited to my account, and for an accurate statement to be mailed to me. 
In support of my dispute, I have enclosed copies of the following : copies of my BBVA billing statements for the months of XX/XX/XXXX, XX/XX/XXXX and XX/XX/XXXX and my XXXX checking account statement from XXXX XXXX proving the funds were available for transfer and that BBVA and XXXX committed a banking error at my expense. 
Please investigate and correct this billing error as soon as possible. 
Sincerely, XXXX XXXX XXXX Enclosures : BBVA billing statements for the months of XX/XX/XXXX, XX/XX/XXXX and XX/XX/XXXX, XXXX checking account statement from XXXX XXXX