I can do it there is no problem with the task:
1) Buy candy at NISHIKAWA Factory (Av. Pdte. Plutarco Elías Calles 17, Granjas México, Iztacalco, 08400 Ciudad de México, CDMX, Mexico)
2) Go to closest Mexpost (Calz. Ignacio Zaragoza 561, Ignacio Zaragoza, Venustiano Carranza, 15001 Ciudad de México, CDMX, Mexico)
Best regards