For those users on the Lite and Plus packages, text and voice credits aren't available to you as this feature isn't available for your use. You can always upgrade your account to access these features by putting in a support ticket through our portal. 

For Pro package users, you receive 100 text credits and 50 voice credits each month (If you use 100 text credits in a month, you will receive 100 more the next month to use). You can always purchase additional text credits by reaching out to us for assistance.