It always struck me as quite rich that those over there who con, when rumbled have nothing to say to defend themselves, so attack. By pointing out their con, you become the one in the wrong - how dare you question their honour and honesty. When caught out, they shout and get aggressive, and hope to embarrass the 'victim' enough that they would rather get away and let the con happen than stay and fight.
...And this isn't the first time I have heard of such ripoff activity from this barber. As Rimms says, the Gunlukbasi one is a better option, also the one on the road that leads to Seaside Villas & the Dolmus terminus at the far end of the prom.