Hello,
Thank you for your question on free ad credits. If you are referring to Google adwords credits there should be an ad banner within your cPanel or AMP for you to click. This should connect to Google where you can claim the credits. If they report as being expired (as they often do), please contact our Live Support so we can reset that for you.
Keep in mind that if you are outside the US, Google will not provide any ad credits. This is Google's decision as we have nothing to do with the credits other than providing the link.
Kindest Regards,
Scott M