Setting up IPN response for CCbill payment processor - dating sites

I have 4 dating web sites and they all use CCbill payment processor. My dating platforms already have payment processor module installed and customer can make a purchase, but when they are returned to my web site, after the purchase, their membership level did not upgrade to Gold automatically. And also, it would be nice if they cancel the membership, so it cancels automatically at payment processor. So, maybe some small modifications to existing code to make it work the way explained it. I can give access to my sites if needed. So, it would require modifications to my 4 dating sites. CCbill processor has testing environment, but I'm not sure if it is returning IPN data after the purchase. Sites are [login to view URL], [login to view URL], [login to view URL], chicagodatingclub.com.