Bitcoin in Colombia is not banned, nor is legal:
https://steemit.com/@kcnnewsColombia caught the attention of the cryptocurrency community in late 2016 when reports began appearing that the country had outlawed digital currency. Jorge Castaño Gutiérrez, Head of the Financial Superintendency of Colombia restated that Colombia does not recognize cryptocurrency as a legal form of monetary exchange and users should be skeptical of online services guaranteeing profits. However, this does not mean that they’re illegal in Colombia. It is only safe to say that Colombia has left digital currency regulation wide open.