DislikedOne thing that I don't like with them is its domain name registered with an anonymous registrar (Domain Discreet), which is used by many fraudulent services.
Just Google for "Rua Dr. Brito Camara".
And I'm not sure if their offices in St. Petersburg are real or virtual!?Ignored
You can ask them to check their office. Or you can ask a freelancer in St. Petersburg to go to their office. Everything is simple, buddy!