The closure of RPC has resulted in more than 600 refugees, asylum seekers, and other related categories of persons, under the responsibility of the PNG and Australian Government, left without food, water, electricity and security which are essential elements of their rights to an adequate standard of living, inherent dignity and right to life.
"Australia blocking but has no right to say no", he wrote on Twitter.
Amid reports of various abuses occurring at the camps, notably the one on Manus Island and another one on the Pacific island of Nauru, the policy has been vehemently criticized by the United Nations and human rights activists.
New Zealand Prime Minister Jacinda Ardern (centre) will raise the Manus Island situation with Malcolm Turnbull on Sunday.
"Australia deny to give our fundamental rights such as water and food", said Adam.
There was no immediate comment from Australia or its representatives in Geneva.
Urging the governments of Australia and Papua New Guinea to fully respect their human rights, Colville said: "We repeat our overall concerns about Australia's offshore processing centers, which are unsustainable, inhumane and contrary to its human rights obligations".
The protest, organised by the Refugee Action Collective of Victoria against the treatment of the refugees, was held outside Victoria's' State Library in Swanson Street followed by a march through to Flinders Street.
Australia scheduled the Manus camp for closure after Papua New Guinea's Supreme Court ruled a year ago that the detention center was unconstitutional, as it violated the detainees right of personal liberty. A lot of them are from countries like Afghanistan, Iran, Myanmar, Pakistan, Sri Lanka or Syria and say returning is not an option.
The units have been built by Australia in the PNG community of Lorengau.
"And obviously the sooner the better, some of them have been there I think for four years", Colville said.
"The men have said they fear they will be subjected to violence at the hands of locals if they leave the compound - and, given there have been violent incidents in the past, we believe these fears should be respected and satisfactorily addressed".
"Australia is not and must not be a resettlement option but it is [Prime Minister Malcolm] Turnbull's responsibility to work with other nations on resettlement options", Mr Shorten told the ABC.
"It's a challenging situation for Australia, they face issues that we don't in New Zealand", he said.
New Zealand says it will accept up to 150 refugees from the offshore detention centers, but Australia has repeatedly refused the offer.
Australia entered into an agreement during Barack Obama's administration for about 1,200 of those detained to be resettled in the U.S.