Hi there @Borkchop81!
Welcome to the Community!
You're absolutely right, I rely on the app to keep track of my data usage too. Do you know if there were any recent account changes made? Typically the usage can be unavailable due to a price plan change. If there are no changes you can recall, can you please confirm if you're able to view the usage via the browser?
Just need a little bit more info to assist you further :).
Have you already linked your new Ignite account number with the MyRogers profile? As I had mentioned earlier, account changes can disrupt the usage availability. Also did you get a chance to check if the usage is available via the browser?
Just as an FYI, if you're concerned about going over the data I would recommend you to set up data limits via the app for each line. By doing so, if you're the data manager you and the user will both get a text message when a line reaches its set data alert.