Build a website for bulk (mass) sending advertising messages from whatsapp

Request for Proposal (RFP): Dear Sir/Madam I need a web based (and PC Windows) script for bulk (mass) advertising messages to bulk mobile phone contact list via whatsapp. The software (script) can run is PC windows too and having locking for copy right. Script must be deliver to me in open source with very good comments and documentation for trace or changing in future. Freelancer must expert in Web API whatsapp. The process of sending bulk messages is as follow: 1- LOGIN: • Super Admin login (admin access to all database and archives of clients) • Each admin, login to his panel 2- CONTACT LIST: Contact list are 2 types: • Bulk raw database contact list saved by admin (default) or upload files with client or generate in range (select country and specify the start and stop in generation range). Client Upload his bulk mobile number files (TXT or EXCEL) as contact list (each file include 100000 phone numbers). • Saved filtered contact list generated in FILTERED PROCESS (4) by admin or client Client’s database are private and not show for other clients 3- SENDING SERVICES: Select the method of sending bulk messages to contact list: Whatsapp with multiple channel manager to avoid whats app blocking. 4- FILTERING PROCESS: Script automatically check, filter and save which phone number in CONTACT LIST having whatsapp account. The total filtering rate is around 50 thousant phone numbers/day or more (totally) 5- SENDER PHONE NUMBERS: The timing of sending depends to submit time and approved double time before able send out. Phone no auto switch using whatsapp channel 6- Bulk Sending Methods: Some SENDING SERVICES accept sending to one contact or group or channel. The methods of sending must not detect as spam by SENDING SERVICES. Sending per phone number in each day must adjustable. Anti-spam detection is necessary for each SENDING SERVICES. Enable auto change proxy server to avoid spamming. 7- REPORTS: Reports include fail sender phone numbers, messages sending, messages delivered, and messages seen. Freelancer please send your Proposal Best Regards