I appreciate the reply and the inquiry to billing.
There wasn't a really a phone issue or anything, just a little bit of a difficult time in understanding due to the accent.
I took a look at my invoice afterward and I do see the difference in taxes. I should have looked at it before asking, but she explained it well enough, and that part was more of a curiosity than a problem.
Hopefully it will be fine when I make my payment next month.