Ghanaian coach Kwesi Appiah thought his Sudanese side Al Khartoum were handed a raw deal in their Confederation Cup elimination by Power Dynamos.
Al Khartoum conceded late in stoppage time to lose 2-0 in Kitwe on Sunday to crash out 2-1 on aggregate.
The referee awarded penalty to the hosts after Nagm Abdelgabar handled the ball inside the box.
Appiah had replaced his goalkeeper Mohammed Abdalla in additional time introducing reserve goalkeeper Adil Eltahir whose first task was to pick the ball from the net after Ngonga won and converted his second from the penalty spot.
The 54-year-old said: "I am very upset; am not in a good mood to comment on this match. "
Appiah was making his debut in CAF-inter clubs competition.