I need an advanced chatbot for WhatsApp

I need a chatbot which can handle around 3000 users at a time It should talk to every user in a natural way according to the given prompt There should be customisable delay in replies not like ChatGPT which responds too quickly It should be able to broadcast pictures and voice notes to the users after getting triggered by specific keywords I should be able to create groups and there should be a prompt system for every group (for special customers)