Squid Private Proxies server integration-with-WHMCS

Hi , i already configured squid private proxy server but i need custom script and details are below. You need to configure WMHCS and make some custom script (probably shell) that will make user authentication at squid server automatically after payment. Script also need to terminate user accounts at squid server if they don't pay for next month (in WMHCS). We want to split 1000 IPs to 500 private dedi proxies (one IP per client) and 500 shared proxies (3 IPs per client). In WHMCS use can choose different packages (10, 50, 100 - 1000 through our website etc proxies) 1. Automatic Delivery/Package Activation of proxies to customers (HTTP, HTTPS, SOCKS5) 2. IP Authorization as a form of validating "who" can login to those proxies. 3. Canceling overdue packages automatically / Emailing invoices when payment is due 5. Easily manage private and shared or other services of proxies from an admin backend 6. Easily add and manage servers and new IPs (linking servers) 9. Admin backend to handle some of these features as they are not user end related. All proxy selling companies are using setup like this. We are looking for person who has done this task before - Squid private proxies server integration with WHMCS . With free Support, free upgrade module , free problem issue fix !!! Don't bid if you didn't done this before and just think that you will know to make this setup !!!