Software for send Bulk Messages on whatsapp

Dear Bidders, You need to deliver the software and let me test it BEFORE payment because I need to verify that messages get to phones in my area. If you do not have experience in this kind of project please don't bid. 1. I need a website or desktop app to send thousands of whatsapp messages. 2. You need to tell me how many messages can be sent every day or every hour. 3. I need to be able to choose between: text, image, audio or video messages. 4. The list of contacts should be read from a plain text file. 5. Must be able to change sender id nummer. 6. Reports need to show how many messages are successfully sent&opening. 7. Your app or software should not require serial numbers or any form of license. 8. Payment will be made only after the software is delivered and fully tested. [login to view URL] must sort out inactive whatsapp numbers