Gold firms Sibanye Gold and AngloGold Ashanti last week offered an additional R1,000 a month to entry-level workers, while Harmony Gold offered R500 a month.
“Harmony’s offer has messed it up, the offer is too low for the members,” Zungu said after a mass rally at Sibanye’s Beatrix mine.
AMCU is demanding a more than doubling in wages, but gold companies say they cannot afford such increases as they battle falling prices and rising costs.
The union will meet with the Chamber of Mines on Tuesday to officially reject what the gold companies called a “final offer”.
“The final offer is just that – final,” spokeswoman for the Chamber, Charmane Russell, said.
She said the Chamber would wait until Tuesday to hear from the AMCU.