"A person wearing black gloves came up from behind and put one hand on my neck and the other on my mouth, while a second person, wearing a black balaclava, injected me in my right arm," she said in a statement to police, which was published by Italian newspaper Corriere della Sera.
"I think I lost consciousness. When I woke up I was wearing a pink bodysuit and the socks I'm in now.
"I realized I was in the boot of a car, with my wrists and ankles tied and my mouth taped. I was inside a bag, with only a small hole that allowed me to breathe."
"I've been through a terrifying experience. I feared for my life, second by second, minute by minute, hour by hour," Ayling reportedly told Britain's Daily Telegraph newspaper. "I am incredibly grateful to the Italian and UK authorities for all they have done to secure my safe release."
Lukasz Herba, a 30-year-old Polish national who resides in the United Kingdom, was arrested on kidnapping charges after dropping Ayling off outside the British consulate building in Milan on July 17, police said.
Kidnapped for auction
According to police, Ayling arrived in Milan on July 10 after agreeing to take part in a photo shoot which had been arranged through her agent for the following day.
Police said that she was then attacked on July 11 by two men after arriving at the apartment where the photo shoot was supposed to take place.