PLEASE ANSWER THIS IF U KNOW SPANISH LIKE NO JOKE ILL KISS U Complete with the appropriate pronoun to emphasize the indirect object.
-me. -te. -le. -nos. -les
– Susana y Sebastián, ¿ llama por teléfono la abuela a ustedes?-- Sí, llama mucho.

Susana y Sebastián, ¿ Nos llama por teléfono la abuela a ustedes?-- Sí,  Nos llama mucho.

Explanation:

It would actually make sense if you use -nos because using te would mean  

Does your grandmother call you on the phone? - Yes, she calls you a lot. The second part wouldn't be correct. using nos would mean  

Does your grandmother call you on the phone? - Yes, she calls us a lot.