I've seen Nader's type do their thing before. Scummy sociopathic druggie men will stick around surprisingly long, provided that money, pussy, and material resources continue being provided to them, while the guys make only a bare minimum of effort in return. The sob stories they use to look "deep" in the beginning are just to trigger sympathy in the female so that she will provide things to him and do work such as bringing groceries for free. He doesn't care about her 20 phone calls and zillion texts because he doesn't care, period. He is there for whatever he can take. If she stops providing AC units/TVs/groceries and such, then he will ghost her. The number she has for him probably is a burner phone as others have guessed.
Chantal is being played. We may have to take bets on how long it will continue until she runs out of shit to give him.