Exede has not provided any gift card promos within the past 12 months. I would advise you to reach out to your local dealer who installed your Exede service, as they would’ve been the ones to offer such a promo.
I am guessing you bundled with DirecTV. They have had a VISA card promotion and it is not unusual for it to take several months for them to get it to you. Remember, although DTV sells Exede, they are 2 separate companies.