From the Billing section > Auto - Reload Funds, you can activate the function and avoid running out of credits
You should configure:
Mínimum funds that will trigger the Auto - Reload
How much will you add
Monthly, Weekly, Daily, etc. limits.
Click on Save changes to save.
Important:
Auto - Reload may have a small delay due to the revision and processing of the payment.
Auto - Reload won't execute during a campaign in process. You must calculate the necessary funds before sending the campaing.