First day in Japan

gooday all, im tryin to recover after a pretty big weekend, partying in tokyo then back in Kamakura, met some cool people and drank a bit too much. So where, I left off. I said goodbye to the boys in Aus and a few girls. About to land in Japan with my 20 dollars. Ok im in the airport, I change my 20 dollars, and servey says...800yen, wow, its not even a bill. Ok , i call my agent (100 yen), they tell me to wait at platform a , I do , they will b there in 20 minutes, ok I but somethin to eat ..200yen, i now have 500 yen. One hour goes bye, nobody I call again (100yen) they ask where I am I tell them they say ok , they will b there in 20 minutes 1 hour later still not there...what the fu.., wats goin on?