Was ripped off in Italy (dont use for Italy)

I was told the calculated fare was 18€ and I was charged 60€ , he told me the metered fare started from when he left his destination, how do I know he didnt circle from the parking lot for 10 min? When I was watching the app it said he was 15 min away then he was 25 min then 14 then 16.. So how dont I know he took the longest way? When I took the cab from the train to the mall it was 20€ so when I ordered the taxi from this app I was told it would be 18€ and I thought that was more then fair.... So I continued with my order. I would never have ordered the taxi if it was 60€ . I could of canceled it when I saw a taxi by the mall. And he would of drove all that way for nothing but thats what I get for being a good person. Better yet if I new it would be 60€ I would of never ordered the cab.
When I was trying to leave the cab and telling him I was told it was 18€ by the app he would not let me out his cab and was saying he was goin to drive me somewhere else .. Or to the police. So I just gave him the money so I can get out. Smh he tried to kidnap me, technically.
I dont see how a cab would ever cost 60€ to travel from Aroso to Rho its a 10 min ride.

Kg dat chick about FREENOW - Taxi and more, v6.5.0