I think via WU or money gram cash as its available almost all countries in the world!
Angola is a country in a non convertible currency zone. It is not as easy as if you live in a convertible currency zone to put your money out of the country.
I think the best bet is to find a foreigner, a Portuguese for example that have access to a Portuguese bank account. It is not hard to find a Portuguese in Angola these days.
The goal is to take money out of angola

thats why im asking, i have a friend (portuguese) that receive her salary in angola, and he canot send money to Portugal