While I still have yet to receive the notification email from them, and I doubt I will now, Delta was very quick to issue a refund and voucher, Upon finding my return on Delta for March was cancelled due to not being a "legal" connection, I called them, played the call back game and requested a refund. This was Sunday, Jan.24 in the later morning that I called. By yesterday, Monday Jan 25 the credit was shown as pending on my CC and the voucher portion of the ticket was already back in my Delta account. As of early this morning, Jan 26, Capital One has posted the credit. Part of the ticket was CC payment and part was a voucher from last year. Very impressive turnaround time on the processing of the credit.