Creating a web page to send USSD commands and display responses from the server would require a combination of programming languages and technologies. Here is a general outline of the steps involved:

Choose a programming language: You can use any server-side programming language such as PHP, Python, or Node.js to create a web application that sends USSD commands and receives responses from the server.

Choose a web framework: You can use a web framework such as Flask (Python), Express (Node.js), or Laravel (PHP) to help you build the web application more quickly and efficiently.

Set up a web server: You will need a web server such as Apache or Nginx to host your web application.

Connect to the USSD gateway: You will need to connect to the USSD gateway using an API or SDK provided by your service provider. This will allow you to send USSD commands and receive responses.

Create a form to send USSD commands: You can create a form on your web page that allows users to enter the USSD command they want to send to the server. When the form is submitted, the server-side code should send the USSD command to the server using the API or SDK.

Display the response: Once the response is received from the server, you can display it on the web page using HTML and CSS.

Allow users to reply: You can create another form that allows users to reply to the server's response. When the form is submitted, the server-side code should send the reply to the server using the API or SDK.

Test the web application: You should test the web application thoroughly to ensure that it works as expected.

Overall, creating a web page to send USSD commands and display responses from the server requires a good understanding of server-side programming languages, web frameworks, and APIs. It may be helpful to consult with a developer or IT professional if you are not familiar with these technologies.