customization WHMCS

I have a php based email marketing software and would like to integrate the software, [login to view URL] and Whmcs. Either your team will put together all the modules and my team of programmers will integrate within the software or you can manage and direct my team setup the entire process. Requirements: 1. initial free 30 day trial followed by monthly recurring subscription payments which are automated 2. pre-pay discounts for 3-6-12 months of service 3. connecting database to software to pull billing/invoice data and reports into software 4. connection with [login to view URL] 5. customization of email templates for credit card payments and declines 6. declined payments after period of days will deactivate software 7. update credit card form in software with whmcs looking to start right away please apply with description of your experience customizing and setting this software, your ability to program or implement changes. thank you