After you receive a call it should show in the Hiya call log. You can then tap on the entry in the log and then tap on "Report Spam." Tap on the type of call it was and then you also have the option to leave a comment.
After you receive a call it should show in the Hiya call log. You can then tap on the entry in the log and then tap on "Report Spam." Tap on the type of call it was and then you also have the option to leave a comment.