Which time zone are your stats based on?
All stats are aligned to stats Pacific Daylight Time Zone - PDT.
Stats are refreshed every 30 minutes. So you may have topped-up your account, or launched your campaign, believing nothing is happening, but you have to check stats after 30 mins to see its exact status.
You may see stats in Google analytics that differ from our platform, in certain circumstances, read the post on Why do I see different results in Google Analytics.
Yeesshh normal working hours are aligned to European time (CET).