The crack addict rock star quit the Meadows clinic in Arizona - where Moss kicked her own cocaine habit - last Monday (28NOV05) after just nine days of treatment.
But despite branding rehab "rubbish", he is determined to resume the therapy to rekindle his romance with the supermodel.
He says, "She's furious with me for leaving rehab - and that's understandable. But I will go back in. I've promised her.
"I don't know how Kate managed to get off the cocaine because I thought the clinic was a load of rubbish.
"When I went there it felt like a prison. It was a waste of time in the middle of the desert.
"But if it means being with Kate, I will go back there. I swear we will get back together."