Twenty-eight female guards were unfairly dismissed by a security company because the client‚ Metrora.
Amid growing discontent over the delay about their applications for restoration of their kingship the AmaHlubi and Nhlangwini clans have partnered to "deal with" the Moleleki Commission.
The commission was established by President Thabo Mbeki to look into leadership disputes.
The aspirant kings applied to the commission, headed by Mohlomu Moleleki, to reinstate their kingship.
Both clans are concerned about the "delay" in the commission's second phase on the kingship investigations.
AmaHlubi spokesman Mgqibelo Maseme said they were concerned about the delay so they have joined forces with the Nhlangwini leadership.
"We have a common goal and we are finalising our approach as a collective," Maseme said
Nhlangwini spokesman Gladman Ngubo said they were not challenging the Zulu's but wanted history to be put into context.
Commission spokesman Welile Khuzwayo said they had written letters to 67 applicants for kingship.
"We sent out letters a week ago and they should receive them soon."