Claim a customer purchased a product from me.

For those who may be receiving e-mails from a company that goes by SquareUp.com beware!
They claim that a customer bought an item from you that they are not satisfied. Hello! I don't sell items to customer for which
I do not sell. I am a small business but get these strange e-mail but just want to make those in my shoe to beware and is a scam.