No registration number of the company

I received a call last week from the lady by the name Noma from company stock exchange to be seen by a gentleman Thabiso to come see me and explain how it works.I loved the short presentation. I just want to find out if this company is registered as I don't see the registration number on the package they gave me.The gentleman who saw me never gave me a business card when he left.He gave me his phone number by mouth and I have not yet used it to be sure of it.When I Google this company it doesn't open for me to check their profile and progress. Please check for me if this company is registered and is legal.I just want to make sure before I start business with them.Your help is appreciated.