so setting the wsdlLocation in the @webservice annotation lead to the error described here
http://mail-archives.apache.org/mod_mbox/cxf-users/200806.mbox/%3C1932ACF3-DCD2-4073-83DD-981FC0F68F53@apache.org%3Ebox/cxf-users/200806.mbox/%3C1932ACF3-DCD2-4073-83DD-981FC0F68F53@apache.org%3E
so it turned way simpler after reading it
the directions there list two options:
1) Update the @WebService annotation on the FooDocumentImpl class to
have the serviceName/portName attributes that match the values in the
wsdl.
2) Update the <jaxws:endpoint> element in your config to add the
qnames for the service name and portname.
the first is if you are not using Spring, so after explicitly bringing the @WebService annotation to:
@WebService(endpointInterface = "main.package.InterfaceWS", serviceName = "InterfaceWSService", name = "InterfaceWS", targetNamespace = "http://Interface.namespace.main", wsdlLocation = "WEB-INF/wsdl/InterfaceWS.wsdl" ,portName="InterfaceWSPort")
to match the service description in the wsdl:
it worked like a charm