This is a scam phone number by someone calling themselves Mary.  She uses a typical overpayment scam where she orders product over the phone, sends a cheque that is worth too much and wants the excess money sent back to her before the victim realizes the first cheque is fake.  Don't be fooled.

This person calls a legitimate business, sometimes using the name Mary, and she orders product and says she will pay with a cheque.  Then she sends a cheque for too much and hopes the business or person will send the difference back to her before they realize that the cheque is fake or stolen.  Don't be fooled.  This person is a scammer, no matter what name they use.