Hi
I hope that U are doing so well.
I have been installing APs in the same country. I had the same issue regarding with Regulatory Domain. And after few depoyments I realized that U have to connect the AP to the Meraki Cloud. Once It recognizes the public IP It will know that is installed in Costa Rica. So once u have registered into Meraki Cloud. U will have the option to change it. In our case SUTEL.
Regards
(I reply again to help non-spanish speakers who read this post)
Johnny Fernandez
Network & Security Engineer
CCNP | JNCIP-SEC | CMNA