Ferguson told New! magazine that she was "shocked" to read what he had said about her.
She said: "I was so shocked by what he said! But I'm not going to retaliate."
Malik revealed in an interview with Now magazine last week that he now believed the relationship was a 'mistake'.
He explained: "It shouldn't have happened. It was just a wrong idea from the start.
"It did end quite badly so we don't talk anymore. We're not in touch at all."
The X Factor pair dated for four months in 2011 following their time on the show. Their romance was criticised due to the fact that there was six years between them and Malik was only 18 at the time.
Ferguson has previously admitted that she is 'done with men'.
"I am a bit done with men, for now anyway. I am yet to find one faithful. I don't know why boys are like that. I think I am too nice with them and let them get away with murder," she said.
Zayn Malik is currently dating Little Mix's Perrie Edwards and insists that the pair 'trust one another'.
Watch Rebecca Ferguson speak to Digital Spy about her latest music plans below: