You must also deny access from what you do not want, and some of the settings are convuted sounding.
Also, the app is not in current development, but worked fine on my newest devices OS, though these are 8.1, 9, and 10.
Hold on, and I will send screenshots with my settings for blocking both spam calls and spam texts.
Keep in mind that nothing that was not in my contacts could get through.
If someone wanted to contact me, they had to give me the number that they were going to use so that it could be entered into Contacts.
This did cause some issues at times, but I had to explain the spam problems I was having.
It was that or else I was going to go without a phone period.
No provider or government agency has any interest in actually stopping the problem.
They will lie and say that they do not know where the calls come from- that is bull because the calls are on their system and they have records of all calls.
I battled for years with this over ny father's landline, and when put on the 'Do Not Call' lists (state and federal) the problem actually became worse by 200% (number of spam calls increased that much).
Anyway, let me take and upload these screenshots.