It's simple. I used to be an outreach worker. You call 1 14 to find a company's phone number. Don't explain your purpose, just say I want to ask if it is the office of the person in charge. Most people say no if they can't find it, and then you will say, can you please give me his office number? Usually I give it to you, and then I call to find the address and location, make an appointment and go directly to find it. Don't worry.