Missing mother wrote chilling Facebook posts before she disappeared with her daughters.

Police have renewed their appeal for information about missing Melbourne woman Tracey Heuston and her three daughters, as its emerged she posted a chilling message to Facebook just hours before she disappeared.

The 49-year-old and her missing children, Zahara, eight, Matika, nine, and Jaylee, 11, were last seen at their Wastonia home on June 28.

Four days later, police found Heuston’s grey Mitsubishi abandoned in the north-eastern Melbourne suburb of Alphington. There has been no sign of them since.

AAP discovered concerning Facebook messages posted on Heuston’s page in the lead-up to her disappearance, claiming family members had caused trouble for her and her girls.

“They need to be reminded who there f**king with befor i depart this world ill be taking some 0ne or maybe 2 with me [sic],” she wrote.

Hueston also posted a number of memes about betrayal and heartbreak in the days prior, including one on June 25 that she captioned with the following:

“To the assholes that want me to hit rock bottom ; What do you want from me why are you not satisfied yet ? you just keep coming back for more ;when is enough ;enough ? ;Stop sucking the life out of me ‘I cant handle anymore ‘and stop crying wolf because im not around anymore ;how much longer do i have to be here and when will i be truly free & relieved” [sic]

Banyule Detective Senior Constable Dale Ward said someone must know the whereabouts of the missing four and encouraged anyone who sees them to call 000 immediately.

“It’s not easy to disappear, especially if you have three children with you,” he said in a police statement.

“We need to find these children and return some normality to their lives.”

Earlier this week Greensborough-based Sergeant Mark Checuti said police had responded to numerous reported sightings that suggested Heuston and her daughters were still in the area.

Heuston’s former partner and the father of the missing girls, Jason Latta, previously told The Age he was struggling to understand Heuston’s recent erratic behaviour.

Latta said he and Heuston’s eldest daughter, Kiya, were desperate to know that the girls are okay.

“We can’t sleep,” he said. “All we want is to see the kids back … to know they’re safe.”

If you have any information relating to the disappearance or whereabouts of Tracey Heuston, Zahara Latta, Matika Latta and Jaylee Latta, please contact Crimestoppers on 1800 333 000.