It's a mistake, just ignore it assuming that your mobile data is still working ok.
I got the same message today when my membership renewed and I hadn't used any mobile data.
The gauge has changed to tell you how much data you've used counting up from 0GB.
It used to start at 200GB and count down.
But they seem to have forgotten to change something else so that a low data used count is being incorrectly detected as your data allowance getting low.
You'd think that they'd have tested all this before rolling out the changes.
I presume that it has been changed in preparation for the imminent removal of the 200GB FUP cap:
If you need to contact 48 support about this then see the links in my signature below.
