Honestly, I think you should call to cancel that way your account is under pending disconnection. Reason I say this is because there is a chance the winback department will try to keep you with an offer. Once it is under pending disconnection, you can call the winback department directly at 619-752-1401 (as long as you haven't been transitioned over to the AT&T side) and they generally have the best options. I've had A LOT better success dealing with them compared to dealing with the AT&T/Directv retention directly. Just make sure when you cancel, it's not getting turned off shortly after. You can always take the pending disconnection off if you decide to keep it. At this point, I think it's completely worth trying for you. I like your odds better of receiving a deal through winback compared to a new offer suddenly popping up in a few days through retention.