I'll add up to this.
If someone sends you a voicemail or an email claiming that you bought something that you didn't buy and wants you to call the number they provided to cancel the order, check your bank transactions first. This is a common refund scams.
If someone also calls you claiming that they're from MS, Amazon, or any reputable companies and tells you the same thing I mentioned above, it's a scam. They don't call you for those.