Better to just call their main support line. Most likely they’ll never have heard of ‘some guy’ and they’ll tell you your iCloud is just fine.
If they fell for that then they're not very smart.
Would a smart person fall for it if a random hobo turned up at their door and claimed to be Jesus, but BTW he really needs you card and pin for 20 minutes, oh and $500 in cash as well!
Assuming people aren't smart because they fall for a scam doesn't do them justice and it shows a lack of empathy on your part.