Twenty-eight female guards were unfairly dismissed by a security company because the client‚ Metrora.
Despite losing 3-1 to Zacheus Malaza High School, East High Academy coach Goodman Ngobeni said he was impressed with his side's performance.
The two sides met in the final of the Mille Cup Under-14 provincial playoffs at KaNyamazane Stadium on Saturday.
Both schools now qualify to represent Mpumalanga in the national playoffs billed for Kwa-Zulu Natal between September 21 and 24.
"The boys played as a team. They are now starting to respond to my tactics," said Ngobeni. "And gauging from today's performance I'm convinced we will do better in the national playoffs."
Nelspruit-based East High booked their place in the final after beating Harmony High School from Piet Retief 4-2 on penalties. The game had ended deadlocked at 0-0 in regulation time.
Zacheus, who are from Witbank, mercilessly thrashed Langa High School from Bushbuckridge 8-0.
Meanwhile, Northern Cape will be represented by Riet Rivier Primary School and Seinkopf High School after Riet Rivier beat Seinkopf 3-0 in the final.
Other provincial representatives that have already been confirmed are Buhlebemfundo High School and Sondelani High School from Kwa-Zulu Natal.
The other six provinces are expected to decide their representatives before September 8.