"She came forward strong, but I'm unsatisfied with the result", Robertson said.
Commonwealth Games organising committee chairman Peter Beattie said they had worked hard with the Australian government on the entry system and he "encouraged" the 6,000 visiting athletes and officials not to breach the terms of their visas.
Cameroon's remaining two weightlifters, along with the country's basketball team, were already heading home, the team added.
The missing athletes made up of three weightlifters and five boxers were last seen at different times on Monday and Tuesday, revealed Molombe to BBC officials.
Authorities have held talks with local African community leaders, who say they have not had any contact from the missing athletes.
"We have to appreciate that Australia is the best country in the world, there's no country in the world like Australia and it's very appealing", she said.
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The Commonwealth Games Federation (CGF) has confirmed reports that athletes from Rwanda and Uganda have also gone missing along with two squash players from Sierra Leone.
"Our aim is to help every Australian experience the excitement and passion of the Games across the many screens of Seven and through social channels".
"If there is a breach Peter Dutton and the department will deal with it".
An Australian Border Force spokesperson told SBS News the Department does not comment on individual cases, but visitors to Australia are free to enjoy their stay as long as they meet their visa requirements.
Queensland Police said it was a "matter for the Cameroon Commonwealth Games Association to address" until such point that the athletes overstayed their visas.