Why am I being charged for data usage from a previous billing cycle on my current billing cycle?
In my bill for the period of July 21 - August 20, 2022, I was charged for 56.07 GB of data, when in fact I only used 35.2 GB. I exported the detailed data usage for each line on my account for the billing period from AT&T's website to add the numbers manually to obtain this number, which was a staggering 8700+ lines in Excel. But I noticed that AT&T had included data usage from the previous cycle as well on my bill, dating back to June 21! When I add that data from June they report on this bill, I get the same 56.07 GB that they come up with. When I called to complain they simply did not seem to understand. They credited me back the overage charges but refused to return the GB to my rollover account, which means I now may have overage charges in future months because I won't have the rollover data as a buffer. I just want to be able to speak to someone who actually understands and is willing to double check their math since it's clearly wrong.