I have read your description and all 3 word files you've sent. I can do this using Python and Whatsapp Business API.
I have previously developer several chatbots programmatically, and this is not big job for me. All my previous bots were for telegram, but I am 100% SURE I can do this Whatsapp Business API based bot too.
I can show you my telegram bots if you want.
Let's chat to discuss further details? Thanks