Sending bulk Whatsapp messages via API - repost

Hello, Need to develop an PHP script with this capabilities . 1- send bulk messages to whatsapp contacts which 1+ million daily. 2- ability to import/export bulk .txt/.csv contain mobile numbers 3- ability to filter active contact list with options ( no whatsapp- last seen ) 4- ability to have language files to add more then 1 Lang 5- ability to add/remove mobile numbers / IMEI , to send messages from . 6- ability to customize send messages and customize how much message to be sent hourly and which numbers used to send the message from . 7- ability to view recent activity and messages history 8- ability to have user sign up 9- ability to add administrator / multi administrators . 10- ability to support the script for any updates later on which can be made from whatsapp end . ( will be paid when doing but it will be needed URGENT when needed ) 11- ability to set number of message for each user to send 12- ability to set mobile number dedicated for user/s 13- ability to set mobile number for share users 14- ability to link it with online payment gateways such as ( paypal-2checkout) 15- ability to make a full web design customization 16- secure the data . 17- ability to upgrade the script later on ( updates will be paid when doing ) 18 Those are basically our needed specs. Please set your price / time to deliver project.