Would MBB call you from a private number?

Ever since I get numerous fake calls regarding my credit card, I made the habit of saying I don't have a credit card (thus cutting the conversation short), but this person said, "Eh, if you don't have a credit card then why do I see transactions here? If that's the case, I'm going to block this card."

Realizing I may have made a mistake, before I could say anything, she hung up. lol?

Just wanted to clarify with you guys onthe private number from MBB before I call their CS to check back.