Developing complete website for chatbot services and channel such as whatsapp , telegram and live chat

i need to offer chatbot services for clients through a complete website which can be developed by developer . User visits landing page see all information and can create an account for demo . after creating an account he can create bot and and integrate with channel such as whatsapp , telegram and live web . Developer has to develop the whole website including landing page design , content writting , video training , User dasboard design and development , bot create , channels integrations and reporting and finally developing backend for the owner of the project to control subscribers process