Yes, it may be a scam. There are certain people who annoy other people by making unknown calls to them. When you are facing this kind of situation, you should use reverse phone lookup service. By this, you can get the details of the caller easily and with greater accuracy. Some days back, when an unknown caller was making nuisance calls on my number, I did the same. Creditsoft offers this feature at a reasonable rate, you can prefer this.
For more details, visit
https://www.reverseaustralia.com/lookup/1300720164/.