Virgin Mobile overcharging me for text messaging

As I sit here typing this I am on hold while a Virgin Mobile customer service rep sends in a report to the billing department, stating that Virgin Mobile has been overcharging me for text messaging because of an error that was made by Virgin Mobile staff.

You see when I got my new cellphone back in January 2011 I signed up for the following:

$35 bundle.
$10 call display / voicemail.
$10 unlimited text messaging.

But apparently someone working at a computer never signed me up for unlimited text messaging (and I text message A LOT!!!)... so when I looked at my July bill I noticed I was being charged an extra $55.80 for text messaging.

So I phoned and complained, and found out that all the way back to when I first got my phone they've been overcharging me for text messaging because apparently some idiot on a computer didn't check all the boxes they were supposed to.

So I am not insisting that they retroactively go back and give me credit for the amount which they were overcharging me. The billing department is supposed to call me back sometime between Monday and Wednesday. (If I don't hear back from them I will call them on Thursday to complain.)