whatsapp bulk sending messages script

If you have developed this solution for some one, please quote a price. I'm looking for ready solution, or to be developed by people who are experienced in the subject who have worked with a project of this. Please message me your sample solution demo before accepting. Thank you. 1- send bulk messages to whatsapp contacts which 500,000 messages or + daily. 2. I need a website extension to auto bulk sending whatsapp message (From Different WhatsApp Account). 3. Allow me to upload contact list via csv or excel 4- ability to filter active contact list with options ( no whatsapp- last seen ) 5- ability to add/remove mobile numbers / IMEI , to send messages. 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. Must compare new uploaded phone number and compare new ones with old ones, then delete duplicate phone number 15. the website can automatically generate along list of telephone number with a starting number (e.g. 91234567, 91234568,91234569,9200000, 92000001, 9200002...and so on. 16. Scheduling to send out whatsapp. Scheduling is important as sending too many will bring in too much inquries which will overload the staff 17. can separate and detect the phone number into contact list to sms or whatsapp (if have whatsapp use whatsapp) If do not have whatsapp, do not send sms. Everytime must detect if a phone number has whatsapp, if yes, send whatsapp again. 18. report interface shows how many phone numbers have whatsapp, how many whatsapp are successfully sent, how many are not sucessfully sent, 19. besides text, can send and receive from image. Video is not necessary at this stage 20. the website can send text, image, message, video to whatsapp. Also, the webiste can receive text and image msg from whatsapp too. 21. admin panel and resller panel ad user panel 22- ability to make a full web design customization 23- secure the data. 24- ability to upgrade the script later on ( updates will be paid when doing ) Bidder must be able to prove previous experience of doing similar project. Otherwise, don't bid. Thanks. Will not deposit any money till you can prove you have really been able to done the project. Will not deposit any money till I can test the website and find it basically functional. ability to upgrade the script later on ( updates will be paid when doing )