Where to get international stamps in Bogota, Colombia?

Hello, I’m from California and on vacation in Bogota, Colombia staying in a hotel in Chapinero. Where do you buy international postage stamps around here? Our hotel front desk was confused when I asked about international stamps and even a post office in town. She suggested a library nearby. Anyone have any ideas? I’m here til Friday, thanks! Or gracias!

Colombia seems to be one of the countries where You actually have to go to the post office to mail things according to this link: Mail, Post office in Bogotá, Moving in in Colombia - EasyExpat.com

Thank you so much, I am back home in SF. How crazy there is no postal droppings within the city, I’m just going to mail my Colombian postcards from home LOL