Mbongo was criticised by the Frenchman Christian Letard
Congo's football authorities have named Gaston Tchangana and former captain Celestin Mouyabi to take charge of their World Cup qualifier against Zambia on Saturday.
Tchangana had a brief spell in charge of the side in 2001 but was replaced after Congo's 2-1 home loss to Tunisia in a World Cup qualifier.
Mouyabi, who played professional football in France, captained the national team at the 1992 African Nations Cup finals in Senegal.
The pair replace Frenchman Christian Letard who was sacked last month for criticising the Congo Football Federation.
Letard accused the country's government and football federation officials of failing to act in the best interests of the national team.
He claimed the country's sports ministry and football federation officials ignored the implementation of a plan for the recovery of Congolese football, which was put together last year.
Congo, fourth in Group One, are four points behind joint leaders Togo, Zambia and Senegal.