No, they consented at that moment with the available information they had. The fact that the information turned out to be false doesn't invalidate the consent

No, they consented at that moment with the available information they had. The fact that the information turned out to be false doesn't invalidate the consent they gave. It's just turns out that consent was acquired via fraud. Consent cannot be retroactively revoked. To give an analogy, if I consented to buy a car that advertised 40 mpg but it turns out that it only makes 37 mpg does that mean I was robbed and that I did not consent to buy the car? No, it means I consented to buy a car that fraudulently misstated its fuel efficiency claims. There should be punishment for such fraudulent claims, but it should not be equated to robbery.