That is one thing you never
do, is give someone that calls you first or is questionable your information. With things like confirming mailing addresses (Are you the homeowner? Is your house located at ____?) and sharing personal information or card numbers over the phone, scammers are able to compile it for identity theft. Like a call from Montana claiming they're raising funds for the Kentucky Fire Fighters, if a "charity" or something similar calls you, they're more than likely to be hoping you're gullible.
By telling them you were going to get your card, they likely marked your phone number down as a potential source of income.
Have your mom report the number(s) to:
File Complaint | FCC.gov
Surprisingly, since I reported the day of this rant, I have not had another call to the house. I did get two more to my cell phone (which wasn't in the complaints filed), but I never answer that unless I know who it is and 99.9% of the time, they call when I'm at work and can't hear it or when it's stuffed in my purse so I don't forget it. I only use my cell phone for emergencies so it isn't glued to my hand for texting and the like.