A childhood belief about imaginary friends

I believed that I had a friend who lived in the phone called cally. I would play with the phone and hear the voice saying "Your number can't be connected please call again". I used to ring him up all the time. I would tell my parents of my friend and dad though 'cally' was a male my mother was having an affair with. I told my parents of this friend in my 20s and finally solved a rift between them.