Website with multiple WhatsApp agents

Hi I am building a website with multiple agent / service providers in a single website but with different landing pages.

Each agent are has to be tracked or capture their WhatsApp message as to understand which agent gets more enquiries.

How do I do it and which package will be suitable for me.

The easier way to say it will be more to like a directory page.
Example ppl finding for a tonne lorry in Ampang. The landing page of Ampang will be clicked and they will communicate with the provider directly. We want to customize for each of them separately in order to understand the demand or enquiry that they are receiving.