Argentina tends to have very specialized and specific services, this is common in several fields, not just translation or visa facilitation (opticians, or nurses for example). The OP can find a visa facilitator ("gestor" in Spanish), who can advise him or her about visa requirements, and provide support throughput the interaction with Migraciones. Probably many of us can recommend a facilitator. Translation, especially legalized translation, is a very different specialization, any decent facilitator can recommend an accredited translator, but it's almost certainly not going to be the same person.