Katie McNamara had her hair chopped off and was forced to lick her own blood off the floor after being repeatedly kicked, punched, stabbed, burned and then locked in a cupboard during a violent bashing last November, London's Daily Mail reported.

McNamara was hospitalised for four months and her hearing was permanently damaged.

Among her attackers was 18-year-old Francesca Raby, a former friend who had lured Katie to a house under the guise of patching up their broken friendship.

Raby had accused McNamara of stealing her mobile phone but called the 19-year-old later that day to apologise and asked her to go to a house.

When McNamara arrived with another friend, Raby and her 26-year-old companion Kelly Louise Garrity wrenched Katie into the kitchen by her hair and began beating her.

McNamara's friend was forced to flee the house after being threatened when she tried to intervene and stop the attack.

The pair then took McNamara in a taxi to another house, where she was also beaten by two men.

Raby and Garrity burned McNamara with cigarettes and hurled a kitchen knife at her before locking her in a cupboard.

The two women then showed off their work to a female neighbour who visited the house the next day.

"I thought I was going to die. They were going to keep me another night if the neighbour had not turned up," Katie told the Daily Mail after Raby and Garrity were convicted on assault and false imprisonment charges.

"I kept asking them to stop but they carried on, laughing at me. I was really scared when they were stamping on my head.

"I couldn't escape - they had locked the front door and there were two of them, I had no chance.

"They cut my hair and then put my face into a mirror and said 'you don't look so pretty now'. Maybe they were jealous of my looks.

"I will never forgive them for what they did."

The neighbour contacted police despite being told she would die if she told anyone.

Garrity was sentenced to four years' imprisonment last week after pleading guilty. Raby was sentenced to 40 months in a young offenders' institution.