My data usage hasn't been updated in almost two months

[ZikunXu]

 

[DennyCrane]

I had that problem too. All of the sudden the app stopped refreshing, even after clearing the cache. You have to pull down to refresh, as @softech said. It's a bit finicky sometimes though, so you may need to try a couple times until it works. 

[softech]

@ZikunXu 

drag down the screen for a refresh

if that does not work, go to Account, logout and log back in after