Vidaxi - Did the dispute include the "loss or theft of an access device"? From my understanding, if the dispute doesn't involve the "loss or theft of an access device" you are looking at the 60 day time frames related to the periodic statements.
Borrowed the language below from John Burnett in the linked thread.
"If the transaction was not authorized and either (1) it was not a card transaction or (2) it was a card transaction but not completed with an accepted access device or (3) done with the consumer's authorized access device but the consumer was not aware of the loss or theft of the access device, and it occurred before the end of that 60-day period (it would have to if it's the only unauthorized transaction), the bank has the privilege of absorbing the loss."
https://www.bankersonline.com/forum/ubbthreads.php/topics/1836504/Regulation_E_Consumer_Liabilit[b][/b]