We have a Pro license valid till March next year but my user says it is a basic license

Hi there! It sounds like you need to assign the license. Have an account admin follow these steps: 

1. Sign in to the Zoom web portal.
2. Click User Management, then Users.
3. Locate or search for the user who you want to assign a license.
4. Click Edit at the end of the user row. This will open a window.
5. Choose the User Type to assign. 
6. After choosing the User Type, use the drop down to select the license.
7. (Optional) Assign add-ons by checking the boxes for the add-on. For Large Meeting, Webinar, or Zoom Events licenses, choose the radio button for the size of the license, if it is not automatically selected.
8. Click Save.

https://support.zoom.us/hc/en-us/articles/115004976063-Assigning-a-license