Hi etohsaphtebazile,
Welcome to the Apple Support Community. This is an issue that is very widespread across the internet. If you do get a popup saying that it is from Apple or any other company, these are just scammers. Apple will never contact you about anything regarding to your Computer or iCloud Accounts. If you do get another call, you can report them to reportphishing@apple.com. The only number that you should call for support is 800MYAPPLE or 800-692-7753.I have included the article so you can find out more information about this and how to prevent this in the further.
Recognize and avoid phishing messages, phony support calls, and other scams:
https://support.apple.com/en-us/HT204759
Good Luck
-Apple_Tekh