By Sunday afternoon, Basic Education Minister Angie Motshekga had not received a report back on the Limpopo textbook debacle, department spokesperson Panyaza Lesufi said.
It was not known what time the report would be received.
On Friday Metcalfe handed over a draft report to the department and to Section27. The two had until 6pm on Saturday to send their comments.
Metcalfe was expected to send her final report to both parties on Sunday. It would be made public on Monday.
The investigation aimed at verifying how many textbooks Limpopo schools had received so far with some observers close to the process believing that it was not being given an accurate picture.
The verification team might have to resume its work when schools open next week, the observers said.
"All of us at [a] meeting [on Wednesday] told the team it would have to go back after the school holidays, because at many schools the boxes of textbooks are unopened and you can't tell if the right type of books or the right amount of books were received," said a source who requested anonymity, saying stakeholders had been told not to speak to the media.
Metcalfe was appointed two weeks ago after Section27, the non-governmental organisation whose court action in May exposed severe inaccuracies in official delivery statistics, and the department agreed that an independent verification was necessary.
The two parties also agreed on Metcalfe's appointment and that her team would measure deliveries at 10% of the province's 4 000 schools.
Under the gaze of stakeholders such as unions, the Congress of South African Students, school governing body associations and the South African Principals' Association, Section27 and the department also agreed on which schools would make up the 10% sample.
Boxes of textbooks still unopened
But with schools on holiday and many principals away when Metcalfe's team began its work last week, "boxes of textbooks were being received by teachers or security guards", one observer said.
"Textbooks are being delivered but some principals are not there because they are away on holiday, so the boxes are being locked in storerooms and are not opened."
Metcalfe and her team "can't get access to these boxes, so they can't verify if they are the right textbooks or the right quantity".
Textbook delivery problems continue to plague some schools, the source said. "I know one school that needed 500 textbooks, but only 300 books were delivered."
Stakeholders at Wednesday's meeting told the team it would "need more time and that it would have to go back after the school holidays", he said. "Metcalfe acknowledged what we were saying."
Speaking to the Mail & Guardian on Wednesday, Metcalfe said the process was "going well: everyone is co-operating; everyone is working hard.
"Our only challenge is time," she said. "We work late into the night and worked over the weekend." – Additional reporting by Sapa