Hi Bonnkeisa,
I believe the best thing would be to contact the Namibia Council of Churches. This is the umbrella body of all the Christian churches in Namibia.
If you cannot find them online please feel free to send me an email and I will check with my church for the contact number and name.
Welcome to Namibia; it is a nation waiting to be reached for Christ. It is also a land of beautiful people who love the Lord. I have seen the hand of the Lord over Namibia because of her people's faithfulness. There is still a great deal to be done by the Church and I am thankful that you are answering that call to come and minister to the Lord's own.
Best regards,
Zenani