That questline does not appear in any of the worlds I play on & I sincerely hope that they have removed this questline completely because it was always bugged & last year they didn't even bother to fix the bugs until after the event was over & since it's a timed quest that meant people weren't able to complete it. I think they actually extended the time limit until a few days after the event ended in order to give players a chance to finish it, which under other circumstances would have been a nice thing to do. However, the second last stage of that questline requires you to send flowers & since the event was already over by the time you could access that part of the questline.... well, that was just a cruel thing to do.
If you should manage to hook up with the mexican, please, let us know. Who knows - we might be able to collect last years final reward from him