Have you ever had to call the emergency services? Why?
good for you
This is good if you are talking in general.
If you are palking in the past up until this point you would use the past perfect:
No, I have never had to call the emergency service.
Both options are gramatically correct though :)
Sandra muy bien
No, I have never had to call an emergency service.
I have never had to call the emergency service.
Have you ever had to call the emergency services? Why?