The A Place In The Sun presenter said she felt she had befriended the 48-year-old radio DJ in the jungle but since the show ended he has ignored all her messages.
Douglas told the Secure The Insecure podcast: "So Chris and I had met on the Ant and Dec Tour, so when I saw him, I was like, I've met you before. We've got a mutual friend , I am the voice of Capital Xtra and you are on Radio X next to the Capital Xtra studio. And he's like, No way. So we had a really good bond since when we were in there.
"And then since we've come out, I kind of message him a bit, and he doesn't really get back to me. So if you're listening, Chris, can you please reply to my voice note?"
The 35-year-old TV presenter added: "I just think he's actually busy. And he's actually got a life outside of me sending voice notes. But when we were in there, we had this thing. So we both love The Hunger Games.
"So just randomly we'd whistle the theme and we would just do that to each other all the time. And that was our thing. So I just send him voice notes doing that whistle, and then he just doesn't actually listen to them."
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Douglas also revealed that several of the celebrity contestants had smuggled toiletries into the camp which were not supposed to be allowed in the reality show.
She revealed: "Chris had breath freshener. I don't know how he got that. And you know, the spray breath spray. So he got that in to be doing that here and there.
"I know that Matt Hancock had some contraband in there. I mean, it's nothing too exciting. But I remember seeing him once kind of flossing his teeth with you know, the incidental brushes. I was like, what is that? I've not got that in my kit."
Former health secretary Hancock has now resigned as an MP after coming third in the ITV series.
I'm A Celebrity 2022 was won by footballer Jill Scott.