Embed AI Chatbot for WordPress

I need an AI-powered chatbot embedded on my WordPress site through a simple HTML snippet that I can drop into any page or widget area. I’m open to you leveraging a third-party platform—Dialogflow, Microsoft Bot Framework, ManyChat, or a comparable service—so long as we agree on it before you begin and the ongoing costs are transparent.

Core functions
• Handle basic customer support, including troubleshooting issues users run into.
• Provide order-related help such as account look-ups or status checks when the data is available.
• Collect payments inside the chat flow for credit and debit cards, PayPal, Cash App, Venmo, and Stripe.
• Trigger an SMS hand-off to live tech support and offer users the option to schedule a video call; the system should automatically book the slot on both sides and send reminders.

What I expect from you
1. A working chatbot embedded on a staging page so I can verify the flow.
2. Full installation on the production WordPress site with any required plug-ins or webhooks configured.
3. Clear documentation covering: how to edit intents and responses, update payment keys, and change SMS/video settings.
4. A brief hand-over call or screen share so I’m comfortable maintaining it.

I’m looking for a clean, reliable solution rather than a proof of concept, so please factor in security, GDPR-friendly data handling, and graceful fall-backs to human support.