STAPELBERG PROP WHERE DO YOU GET MY CELL PHONE NUMBER FROM DENNEYSVILLE

I stay in Denneysville and i have just received a sms from cherise@stapelbergprop to asked me if i want to sell my property what i need to know is where does a company that is base in Pretoria even know where Denneysville is and 2 nd Question is WHERE DID THEY GET MY CELL PHONE NUMBER FROM i sm not listed anywhere