Likely will be some kind of info added to the bottom of your next bill. Doesn't sound like a sports package renewal, those usually use the description.
Check the bottom of the equipment page on directv.com and see if anything shows in there. That is where things like B1G1 premiums and other things are noted when added to an account.
I have had a 0.00 charge on my bill since adding the Directv Deportes pack. The bill reads something like "Directv Deportes $4.99, Directv Deportes HD 0.00". Not sure if that's related.