Unable to change billing address to get local channels on DirecTV Stream

I moved to Indiana from the middle Tennessee area over a year ago. When I created my DirecTV stream account shortly before the move, I gave my card information, and I suppose my card was associated with the address (my parents') in Tennessee. So once in Indiana, I noticed that I had the Nashville area local channels, not Indiana. I didn't mind too much then, since it was familiar, but recently I've wanted to switch over to getting the local Indiana channels. Recently, I received a new card since the previous one was expiring soon. In the process of activating this card (which is the same number, just a different 3-number security code and expiration date) I did finally update my main address through my bank. On DirecTV's website, I've tried to update my billing address through "My Payment Info," but every time it rejects it, says "Card declined," and the address remains the Tennessee one. The card though is accurate, and I've been billed and been able to make payments with it with no issue. So I'm unsure why it refuses to take my actual address. If it's relevant, it is technically a debit card, which I've read elsewhere could be an issue? But like I said, I've been able to pay my bills on this account for the past year with a debit card, so I don't think that's the problem. Anyway, I would just like to know how I can update this address. If I have to call, so be it, but I thought I'd try my hand with this forum first. Thanks!