Balance Display not updating

[PeeWee1987]

Can anyone tell me why the balance display on my phone is not updating anymore?  I have a Samsung Gusto that I bought on 1/5.  It updated the first few times I used it and then it just quit.  I can still get the balance online, but it would be nice to have it there on my phone.  I bought my husband the exact same phone on the same day, and his did the same thing.  I've looked all through the manual and this website and can't find anything.

Thanks in advance,

Celeste