The former TOWIE star, 28, was targeted by ex-Hollyoaks actress Steph on Twitter in May, when she accused him chatting her up while she was dating ex-boyfriend Sam Reece, and trying again when she was with Jeremy McConnell.
But Mario has now spoken to Daily Star Online, calling Stephanie's claims about him and One Direction's Zayn Malik a "bit far-fetched."
Alluding to Stephanie's statement in the Celebrity Big Brother house that she ended a burgeoning romance with Zayn Malik, he said: "Next, she will be saying Beckham tried it on with her and the list will continue."
He added: "I don't really get her at the moment. The girl I used to be friends with and knew would never do anything like she is now. I guess she is sensitive, but the girl needs help.
"It's not going to end well, she needs support."
Steph, 23, had tweeted Mario in May, saying: "Ooo mario please please don't chat me up for years and wind Sam up, even Jeremy... U clearly wanted me all to myself happy new year (sic)."
Mario was quick to respond and appeared to hit back at Steph's claims. He replied: "You actually need medical help... I have screenshots of everything... Please leave me out of your meltdown."
Stephanie, however, continued to claim Mario had tried it on with her while she was with Sam and Jeremy, adding she'd even been introduced to Mario's beloved nephew Buddy, the son of Tom and Giovanna Fletcher.
She said: "I'll destroy you. @samreece even he will say how much of a sly pr*ck you are... Here's w few messages after being out with Jeremy and which I never told him of you wanting me... Shall I tweet and finish you off... (sic)"
Mario tweeted: "Not even going to bother responding.. I actually feel really sorry for the girl... How many more red flags till her family help her? Shame."
Stephanie announced in May that she's pregnant with her first child, but ex-boyfriend Jeremy has publicly cast doubt on whether he's the father.
Speaking to OK magazine, Steph said: "My pregnancy was a shock but I can't wait to be a mum. I hope that Jeremy will want to be a part of this baby's life, but if he decides not to then I am prepared to raise our baby on my own."
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