How do you say "Give us a call."

Question

We are askig an audience to call my maid service.

Answer 1

It is "denos una llamada"

Answer 2

( llámennos al + numero)(Call us at+ number ) would suffice.

Answer 3

HI Joe, welcome

As an anouncement I would chose:

¡Llámennos!

You can often see:

¡Llámennos e infórmense!