A few weeks ago I got a call from a robo scam left a message that the IRS had a lawsuit against me. Yeh right, but when I called them back to rip them a new one all I got was a busy signal the few attempts I made. Go to hell scammers.
I got one of those voice mail messages a couple of months ago, also. I've got to admit, it made me pretty nervous. I think did a google search on the call back number they left along with the letters "IRS" - and got multiple links showing it was a scam.
I got that one a couple of times. I ignore it.
I hope you didn’t inadvertently call a fee-number. Not all fee numbers are 1-900.
The scam can simply be in getting a person to call back, so I never do.
Hopefully the # you called had already been blocked.
Don't call back scammers or missed phone calls you don't know, or you may be calling a premium service phone number, for example a phone-sex number, and find you have a phone bill for $50, $100 or whatever they can get away with. A common scam is for someone to call your phone and let it ring once or twice and hang up. Most people call the number back, and they get taken to the cleaners. Don't call numbers you don't know.
On another note, if you come back to your car after it was sitting in a parking lot, and you find a small note on your windshield or back window, lock your doors and move to another location before you get out to see what the note is. Most people get out right away and someone will dive into your car and take your belongings. If you had started your car, and then got out to retrieve the note, which is common, a car jacker waiting nearby can then slip in and take your car and belongings.
There's all kinds of set-ups taking place now taking advantage of our good nature or common behavior.