Caller: No clue

I've had 3 different numbers call me over the past 2 days and they are all extremely similar to my number, only the last 3 digits are different for each phone number. I declined them all, however I got an automated voice message saying I purchased an illegal substance (which I didn't, I'm 13) and yeah I have no clue why this is happening and I don't know if it's just a coincidence or not .....