Connect A2Billing to website for online sign up

We need you to make some changes to "A2Billing" so that people can sign up for VoIP or FoIP services online through our website. Please check the attached document for further details on changes needed to be done to A2Billing. Payment Terms: Payment will be deposited in Escrow account and will/ should remain their untill the project has been completed. • 25% advance • 25% on first delivery: when the project is completed and given out for testing • Remaining payment on successful installation/ configuration of service along with the submission of source code and manual.