WhatsApp stores the media files you share only temporarily.
WhatsApp will not record or track your audio/video calls.
WhatsApp does not store your messages. You can opt to back up with Google Drive or Apple iCloud.
If a business chooses to use Facebook's secure hosting infrastructure, it will use the messages it processes on behalf of and at the order/s of the company.
Hiring a third-party company to host and store the messages is an industry-standard practice.
User can easily block a business anytime.
You can either stick to WhatsApp, hoping India to implement new data protection laws Or switch to another app, which is not owned by big tech companies.