I recently booked a ticket with Trav Bank. I canceled the ticket a couple hours later, but they did not refund the travelbank funds. Needed to huca many times, until I finally got a nice rep who called both the refund dept and the travbank dept, and had them refund the travbank. It was stuck somewhere in between the 2 because it was showing as 'voided' and not canceled, and void doesn't need to be refunded, until I got the rep to explain that it does...
B'kitzur, if you are buying with TB and need to cancel, wait until after the 24 hrs before canceling.