Hola Javier,
On my personnal experience ( and also from what i see on recent members ), your address is given 4-5 days after reception of the first letter to another member. This delay is probably due to the queu of address waiting for a letter. As there are more and more members, this delay should be shorter.
After it depends how long time the sender is taking to prepare the stamps and then the travelling time to Chile. As many members are from Europe it can take a while, but it can be even longer if it is coming from Russia or India. I really hope that you will receive it soon.