If you'd like to stop receiving messages from businesses on WhatsApp, please follow these steps:

Android

1. Open the chat with the business.
2. Tap More options > Block.

iPhone

1. Open the chat with the business.
2. Tap the business name to find contact info.
3. Scroll down at the end of the page > Block Business.

Windows

1. Open the chat with the business.
2. Tap the business name to find contact info.
3. Tap Menu button > Block.