In April, 2014, I got the warning that my account was approaching its max. Then I got messages that I exceeded my 1 GB limit by 10GB! My usage (which has never exceeded 1 GB), has not changed in any way. But I am now on the hook for major overage charges.
Customer service tells me that they can't do anything until 1 week after my billing period closes (another 2 weeks away). I am afraid to use my service for fear that they will gouge me for usage that I am not using.