There is not a service like that in the country. However we are going to tell you how to find these people on Omegle. If you would like to meet with Angolan, there are many options for you on internet. You can always try Facebook and some Portuguese chat sites for chat with these people. However it’s hard to find them on this site. People from Angola are warm and friendly people. You are going to find a few of them on the site but I am not sure how many men or girls you are going to meet there. If you can’t find any of them, you can look some local chat sites.
If you want to meet with people from Angola, you should add a few keywords about country to your interests. So you will able to find these people and you are going to chat with them. It won’t take your too much time to set your keywords. Just Google the country name and add the results to your interests. Omegle is a good opportunity for you which you can find lots of girls from Africa. However it’s not easy to specify genders on the site. All the same it’s one of the best free chat service with many online users.