Hi There,
Greetings for the Day !
I have read your description and here, I can help you to create a website in which scheduling appointment and payment system would be integrated based on your requirement, kindly let me know your site url, which payment gateway would you like to integrate over your website.
Whereas, the scheduling system is to book appointment/demo ? Kindly let me know the details through chat, will analyse and help you to implement this project in a proficient way.
I look forward to your response and thanks for your valuable time and consideration.
Thanks,
Mirth