Bulk WhatsApp Broadcast Setup & Send

I already run a WhatsApp Business account and have an Excel sheet with roughly 4,500 mobile numbers ready to go. The task is straightforward:

1. Import every contact from the spreadsheet into my WhatsApp Business address book.
2. Push out one identical, pre-written message to the entire list in a single or appropriately segmented broadcast.
3. Provide a brief confirmation once the send is complete (delivery/read stats or screenshots are fine).

The message is final—no per-recipient personalisation is needed—so your focus can stay on a clean import, an error-free blast, and staying within WhatsApp’s usage policies to avoid any number blocks.

Experience with WhatsApp Business bulk messaging tools or API wrappers is obviously a plus; if you prefer a particular method (e.g., official API, approved third-party platforms, or phone-based broadcast software) just let me know how you’ll keep the account safe.

That’s all the scope; once the contacts are in and the message is successfully delivered, the job is done.