An Australian woman who claims she was drugged and raped while holidaying in South Korea has turned to the internet to help track down her alleged attacker after she said local authorities bungled the investigation.

Adelaide woman Airdre Mattner, 25, said the sexual assault occurred in Seoul in September but "negligent" local police had "falsified" her account, leading her to pursue her own criminal and civil cases in London, where she said the alleged rapist lives, the Adelaide Advertiser reports.

"I want to highlight the epidemic of this crime happening in Seoul and the way that these crimes are dealt with by Korean authorities when they are reported, which I recognise is rare given that a lot of women do not have any faith in the Korean authorities," she said.

"It is horrifying how easy it is to fall victim to men like this."

Ms Mattner has set up a GoFundMe page and is appealing for donations to help her collect evidence in Seoul and finance her cases.

She said she has received a lot of support from victims of sexual assaults, including 16 who were attacked in Seoul.

Ms Mattner, who was on a break from her job as an English assistant language teacher in Japan, said she was on an organised pub crawl in the Hongdae region of Seoul on the evening of the alleged rape.

She said that at the third venue of the night she blacked out despite only having a single drink.

When she woke up she said she was in the back of a taxi with men she had never seen before who were not part of the pub crawl group.

She said she threw up and pleaded with the taxi driver to take her back to her hotel but she ignored her while one of the men in the back with her took her phone away before she passed out again.

The next thing she remembered was being on a bed in a hotel and trying to fight off a man trying to rape her but being unable to prevent the attack in her drugged state.

"I woke up the next morning completely naked ... my clothes were strewn across the room, my dress ripped open," she said.

Ms Mattner said she reported the incident the next day and was subjected to a series of medical tests.

She later discovered that proper procedures were not followed and no DNA evidence was collected. The Adelaide woman was even more shocked when she read her medical report that stated she "was drunken and lost her consciousness after large amount of alcohol ingestion with some one".

She said the report was "false and completely fabricated" because she clearly said that she had been drugged.

"It appears the staff at the hospital did not test me for any rape drugs that were in my system even though I had explicitly said to them that I was sure I had been drugged,” she said.

The next day Ms Mattner received a friend request on Facebook from a person she believed had raped her.

She gave the man's photo to police but they ruled him out as a suspect because their records showed he was out of the country at the time.

In January, Ms Mattner heard from the Australian consulates in Japan and Korea that the investigation into her rape had been closed.

"It’s been the most stressful, horrific, upsetting, horrible six months of my life,” she said.

Ms Mattner said that with very little chance of a criminal prosecution in South Korea she made the decision to pursue a criminal and civil lawsuit in London.