I have been talking to the Mexican consulate for 2 weeks for my consular registration and passport that expires June 6 and they do not give me an answer for an appointment

Do not call, if they give registration and passport I have a couple of days to get them, better try to make the appointment from the internet portal, if the Dallas office does not appear it means that all the places are already occupied, so you have to try to make the appointment from the portal after 12 at night only then you can get a place

In Dallas they don't give registration only passport renewal... For registration you have to insist calling Little Rock