Zambia had won the first leg 3-1 a forthnight ago courtesy of goals from Noria Sosala and Grace Chanda, while Lorraine Jossob scored the consolatory goal for Namibia.
In the return leg, Chanda gave the visitors a two-goal cushion after 47 minutes before Zenatha Coleman pulled one back for the hosts from the penalty spot on the 50th minute following a handball incident inside the box by Martha Tembo.
Coleman again found the net for Namibia on the 82nd minute but it was not enough, as both sides settled for a draw, which gave Zambia a 5-3 aggregate victory.
Zambia will now face the winner between Tanzania and Zimbabwe for a place at the 10th edition of the women’s football event in Cameroon.
Zambia: Hazel Nali, Grace Zulu, Anita Mulenga, Annie Kibanji, Martha Tembo, Rhoda Chileshe, Mary Wilombe, Barbara Banda, Grace Chanda, Noria Sosala, Hellen Mubanga.
Substitutes: Catherine Musonda (GK), Emelda Musonda, Ireen Lungu, Jane Chalwe, Milika Limwanya, Misozi Zulu,
Namibia: Agnus Kauuzu, Stacey Narris, Uerikondjera Kasaona, Lovisa Mulunga, Lina Katota, Lorraine Jossop, Memory Ngonda, Esther Amukwaya, Eddelsisingh Narris, Thomalina Adams, Zenatha Coleman.
Substitutes: Rita Williams, Annouscka Kordom, Anna Shikusho, Vewe Kotjipati, Juliana Blou, Juliana Skrywer, Mellisa Eises, Twelikonjela Amukoto