When you send the airtime request successfully, you initially get a 'SENT' status. 

This means that we have successfully sent the request to the Telco(e.g Safaricom, Airtel, MTN etc) but are yet to receive the final delivery report from them.
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Once the Telco successful send the money to the phone number and we receive the delivery report the Status on the dashboard is changed to Success.
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If you wish to get notified once the transaction is completed, check out this article :
​http://help.africastalking.com/airtime/how-can-i-get-notified-when-the-airtime-is-sent
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Some times the transaction may fail at the Telco for various reasons. For further information send an email to info@africastalking.com
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