Salum is a Patagonian company: its head office is in El Calafate, and the Salta branch sells the Norte trips — the Cachi full day among them. That makes it useful for anyone doing the long north-to-south Argentina trip who would rather book both ends with one operator.
Its WhatsApp number is the El Calafate one, which is why it carries the 2902 area code and no mobile 9. It is the number on the booking links on their own site.
The pin sits on Avenida del Bicentenario at street level rather than at number 424.