The 20-year-old, who was the recipient of the Urban Warriors' rookie of the year award last season, has become an important member for the team this term.
His representative, Rob Moore, is pushing for an improved contract at Ikamva, which he says must justify the R5 million Ajax value him at.
"What I will say is that Mobara is unhappy with the management of Ajax Cape Town. He has repeatedly asked, for the past four months, to negotiate for a new contract," Moore told Soccer Laduma.
"What he earns from a club that, in the last transfer window, slapped a R5 million price tag on his head when (Orlando) Pirates, (Kaizer) Chiefs and (Bidvest) Wits came looking to sign him, is embarrassing to be honest, and it is really upsetting him.
"It's no good that Ajax say they have a great youth system that produces wonderful young professional players, but then continue to pay them as if they were NFD players and demand a king's ransom as a transfer fee.
"If young players come through the ranks and then turn out to be good footballers, reward them accordingly. That's only reasonable."
Ajax, responded through their CEO Ari Efstathiou, blaming the player's agent for the delay in agreeing new terms.
"The player was offered a much improved contract in May this year which he indicated he was happy with," Efstathiou explained.
"The club was not obliged to do this as his contract had still three years to run, but felt that they would reward him for his commitment to the club.
"Unfortunately his 'agent', Rob Moore, is unfortunately not recognised by Ajax. He is not a registered agent with SAFA, and has been the reason the player has still not signed his improved contract."