Mjpc

hello, so i grinded for 1h30 hour to find a ditto in order to complete the bike voucher quest. When i finally gave it to old biker steven he gave me the voucher and the game disconnected like it often does. When i came back i had no voucher and no ditto, i went to the bike shop and he just says to me that the bike is 9999999 and that i dont have the money. Steven says to me that there are dittos on route 8 and 13 and nothing more. WHat can i do ? i really don't want to grind for another ditto