I need a WhatsApp Bulk Message Sending solution for our business.
1. Able to switch sender numbers easily (please advise on how to automatically buy new numbers)
2. Able to send WhatsApp message to a list of users (by spool, there are over 500k users to send out in a week) in a speed that will not be suspended by WhatsApp easily
3. Able to import the Message Template, Receipts and Senders
Don't wish to use the Business API.