Wrong date Pokémon cafe Tokyo reservation

I booked a reservation for the Pokémon cafe in Tokyo. However the site kept crashing every step while doing so i accidentally booked it on October 1 instead of Oct 3rd… i just noticed it now as I’m making my itinerary… i was debating if I should switch reservations with someone on here or check a day before/of for open tables. Theres no way I can make it to the reservation as I arrive in Japan on the 2nd. Or should I call it a loss… What should I do???