Hi Stanleyvincent,
You may use the steps in Check your iCloud storage on any device to verify your iCloud available storage.
Regarding and end of storage, are you referring to the temporary storage provided with the purchase of a new device described in Get temporary iCloud storage when you buy a new iPhone or iPad? If so it is expected that storage is only available for 21 days:
"You have 21 days to restore your temporary backup to your new iPhone or iPad before your temporary iCloud storage expires and your backup is permanently deleted.
Do not erase your current iPhone or iPad until you restore your temporary backup to your new device.
If your new iPhone or iPad doesn’t arrive within 21 days, you can get an additional 21 days to restore your temporary backup before it’s deleted. On your current iPhone or iPad, open Settings and tap Keep My Backup Longer."
Regards.