The mother of an autistic teenager claims he has been serially targeted by bullies to the point where he now suffers seizures and blackouts.

An attack on the 15-year-old - who cannot be identified along with his mother or alleged attackers - was caught on a smartphone camera at Westpoint shopping centre in Blacktown in Sydney's west.

His mother claimed it was the fourth attack her son had endured at the hands of bullies who had previously tried to steal his scooter and his phone and rub chewing gum in his hair.

The alleged attack took place at Westpoint Blacktown.

"They took it upon themselves to make it their mission to just belittle him when he was just trying to be like every other teenager," she told A Current Affair .

"Those kids could have killed my son, he spent a couple of days in hospital and now he suffers seizures and blackouts for what has happened."

She said the video had been passed on to her by a third party, and claimed it had been edited to cut out part of the alleged attack.

The teenager told A Current Affair he believed he was attacked for "fun and entertainment".

The teen said he believed he was targeted for "fun and entertainment".

"For me to see his body elevate from the ground and be thrown across on to a seat and hear his head smash onto the seat is an image I cannot get out of my head," his mother said.

"I will live with that for the rest of my life."

The teen's family hopes that speaking out about their story would help one of the alleged attackers, or their parents, realise the devastating consequence of bullying.

"I hope they see this and know that the path they are on is a path of destruction," the mother said.

Kogan Online Shopping donated an iPhone 7 to replace one the teen claims was stolen in the alleged attack.

One teenager has been charged with assault over the incident and will appear in court next month.