Taxi driver got rip off by this guy here what happend to this driver's

I got scammed by the skinny black young guy wearing blue woodi , I pick up from financial district he told me to take me 88/87 park ave n told me to take fdr drive in between the destination he paid by Arro app n when we reach the destination I stop the meter n fare 30:80 tips 30:80 he told me he made a mistake he wants to give $2 tips , so it old him I will call CMT but he told me he don't have any time n he told me give him him $30 in cash , I feel suspicious, I told him to write your adress n phone no[6/17, 2:02 PM] ‪+1 (718) 415-2149‬: He wrote n I have him $30 in cash in on tho I was not felling comfortable so I called Cmt they told me it was a scammed n never give cash back then itemized : I learned the heard way , never give cash back. Well that what happened with me yesterday it was skinny black guy and i dropped him off on north end ave.