The document also alleges the government has failed to provide the 36-year-old with uncontaminated halal food, forcing him to survive on bread and milk since he was moved to Brisbane Immigration Transit Accommodation (BITA) from hotel detention in August last year.
“I do not want to remain in detention in Australia,” he wrote in the affidavit, filed as part of a legal action against the Minister for Home Affairs on 14 March.
“The purpose of me being detained here was to receive medical treatment. I am not receiving that medical treatment. Therefore, I do not want to remain here, in detention, any longer.”
The detainee detailed experiencing chronic headaches, stomach issues, dental disease, anxiety and despair since he was detained eight years earlier.
A letter from a neurologist regarding his condition, seen by SBS News, said his chronic headaches were likely related to poor sleep and tension stemming from distress over his living situation, in which he shares a room with three other detainees.
“I’d support a change in his living environment as likely to be beneficial for his headaches,” the letter states.
The details have come to light as lawyers launch more than a hundred legal actions on behalf of Medevac-transferees who they argue are being indefinitely detained.
Migration lawyer Daniel Taylor, who represents the man, was involved in the release of seven refugees from hotel detention in December following a major Federal Court ruling in September that used the legal principle of habeas corpus to secure the release of a 29-year-old refugee.
Mr Taylor and migration agent Noeline Harendran have since launched about 130 legal actions on behalf of Medevac transferees.
“The argument for all of them is the same, that their detention is unlawful and the remedy that we are looking for is what we call habeas corpus, where we want freedom and release from detention [for the men],” Ms Harendran said.
In the above detainee's case, Ms Harendran added, they were also seeking to ensure culturally-appropriate food was provided.
“In this particular gentleman’s situation, he has irreparable health issues because of the type of food they’ve given him,” she said.
“It is not fair that any human being that we are detaining … is treated this way.”
In September last year, a group of Muslim Medevac detainees in Brisbane’s Kangaroo Point hotel detention lodged a complaint with the Australian Human Rights Commission (AHRC), assisted by lawyers at the Asylum Seeker Resource Centre (ASRC), after they discovered they had not been given halal certified food for more than a year.
ASRC case worker Nina Field on Tuesday said the complaint process was ongoing and she was still hearing reports of ongoing issues with the food at both BITA and Kangaroo Point, including that the same kitchen was used to prepare halal meals alongside pork.
“There was an initial response from the Department [of Home Affairs] which was pretty inadequate,” she said.
“Since the complaint was lodged with the AHRC there have been further issues at both sites … that the men have lodged further internal complaints about.”
These complaints included that a stew with bacon was served earlier this year without warning and that some desserts have had gelatin products in them, which is often made using pork.
Under Islam, it is a sin to eat pork or pork products and there should be no contamination of halal meat with non-halal meats.
A Department of Home Affairs spokesperson told SBS News detainees are provided with culturally appropriate meals, including halal, and at the appropriate time during Ramadan.
"As this matter is currently before the court, it would be inappropriate to comment on the specific details of the case," they said.