Different Spira SOAP API than described in the online manual.

We would like to use the Spira SOAP API to automate some tasks. Today, I found that the online manual (https://www.inflectra.com/SpiraDemo3/Services/v4_0/ImportExport.aspx) describes more features than our local hosted Spira Server.

Two funtions we are interested in are: Requirement_Indent ( ... ) and Requirement_Outdent ( ... ). In our local server's wsdl file does not contain these functions, while the online example does. So I thought to link (from Visual Studio) to the online example's wsdl file. Now, I have the functions. But when I try to run them, I get an error that:
The message with Action 'https://www.inflectra.com/SpiraTest/Services/v4.0/IImportExport/Requirement_Outdent' cannot be processed at the receiver, due to a ContractFilter mismatch at the EndpointDispatcher. This may be because of either a contract mismatch (mismatched Actions between sender and receiver) or a binding/security mismatch between the sender and the receiver.  Check that sender and receiver have the same contract and the same binding (including security requirements, e.g. Message, Transport, None).

How can we force the SOAP API to be updated to the latest standards?

P.S. I do not have direct access to the server myself, but I am an Spira Admin.