Today I called Hart Telephone to schedule an installation. Nobody answered, so they just put me on hold. About every thirty seconds, they said that you could simply schedule a callback instead of waiting on hold. But I didn't do that, because they never call you back!
Anyway, after keeping you on hold for three minutes, they then cut you off! I called back two more times today, again waited on hold three minutes each time, and promptly got cut off. So, I never got to speak to anybody.
Sadly, the "customer service" at Hart Telephone is almost nonexistent. Although their telephone and Internet service is pretty good, trying to contact them is usually a nightmare. Please keep this in mind before deciding to do business with them.