The display shows "Omatome Seikyu Service (combined billing method) has already been registered." on the online application screen for "Omatome Seikyu Service"
回答
If the line has already been registered with "Omatome Seikyu Service (combined billing method)," you can't make a new application with the line.
If you want to add a line, please register the line by the following screen.
Application for registration of additional lines for Omatome Seikyu Service
