Create an order function in the WhatsApp Chatbot (There is a video showing it)

I need someone good at C# who can do the same thing in my WhatsApp chatbot as shown in the video. Within the chatbot, you will have to create a function or procedure that can create a menu according to my Chatbot, which includes submenus and can go back to the previous menu and at the end shows the subtotal and the total. Watch the video carefully. My maximum budget is $180. Do not bid if you do not accept this amount.