How to reject calls from a country on S7 edge Nougat 7.0

[AC Question]

I keep getting spam calls from +67 country code. How do I block all numbers starting in +67 on my S7 edge Nougat 7.0. I can currently only enter blocked numbers one by one, and that doesn't solve my issue, as they keep calling from different numbers, but from the +67 country code.