Taxify horror

I just had R75 off and I requested taxify for a friend leaving my place to his place. When the driver realise its free he calls me and starts swearing me calling me names and how he will have me kidnapped. He wanted to bring the passenger back to my place because he wouldn't have left my area to another are for free. My night has just been ruined... I can't believe we still have such people in the world who don't understand how their jobs work