It appears that the Democratic Republic of Congo has only recently changed its visa regulations, and the current rule is that you can only enter the country with a visa issued in your country of residence, or the nearest country with a DRC embassy. We rolled up to the border in Luvo/Lufu (Angola/DRC) with a visa issued in Windhoek, and they refused to accept it. We spent 10 nights on the border, with embassies and foreign ministries involved, but no success. In the end we re-entered Angola (with exit stamps already in our passports, which is now a major problem).

It is not a matter of corruption or bribes, but total nonsense Congo-style. We are not the first ones to face the problem, but those before us managed to get through after 2-3 nights of waiting since they had their nationalities represented in Kinshasa by their embassies. We have no DRC embassy in our country nor our embassy in Kinshasa and none of the high guys in DRC apparently have education to address this issue, even French embassy confirmed us that the immigration officials are imbecils in DRC and don't understand the system themselves so for them it's just easier to say "no".

So if you have a DRC visa done outside your country and don't have your country's embassy in Kinshasa, don't even bother - spending a week or more on the border with nothing available is just ridiculous.