No prob. They're indispensable on those routes.
If I remember rightly douala tower passes you to douala control, check in with them, next call NLY, yaounde. Don't know for sure what what calls they actually made. I would speculate the 'last call' as reported was the handover. Just don't know. Just for the record, the crew would have been fresh, having joined in douala.
We're just very anxious they find the aircraft soon. CNN reporting air search suspended due weather.