The 'remaining company data' is used for all devices within the company. The remaining data for specific devices (I assume this is what you were referring to when you said that you have 0 Bytes available), is data for that specific device. RMS data packages can be used to assign data to specific devices. However, the 'company data' can be used by all devices, so data is not the issue here.
The issue is probably with the VPN Hub configuration or the device itself. Please, take a look at our YouTube tutorials here and here. The RMS has a new design, but the configuration should be similar. If you are having problems navigating the menu, you can switch to the old design by pressing 'Go to old RMS' button in the top right corner.
If you are still having problems, please, ensure that the device has internet access and share some details regarding your configuration.