PayPal Subscriptions and Recurring Payments Expert Needed

We currently have a Membership Site Script which works just fine... We even have it integrated into PayPal to place subscription orders. We are using The PayPal Business Account. What we need is just the finishing touches to make sure that the recurring payments are credited to the user accounts to keep them active. Subscriptions are automated, and we want the process to be as hands-free as possible. We also need to make sure that it changes the status of an active account - to inactive if the payment is not made, or the subscription cancelled. We are standing by to receive bids and we provide live chat support once you are chosen. This should be an easy fix for anybody who really Knows the PayPal API inside and out. I assume we will most likely just need the Callback API Scripting Please Only place a bid if you Are Completely familiar with the PayPal API BONUS: If you also know how to integrate Google Subscription Billing Let us know and we will pay a bonus, but it is NOT a requirement.