Here is a free short and simple effective telephone script you can use when you do not know the decision maker in a company you are targeting:
“My name is First Name, Surname I work for The Widget Company. I hope you can help me?
We are a market leader in Widgets and work with other retailers such as Kingston’s and Chelsea.
We not working with you yet, and I wonder who the best person is in your company to speak to about this…………”
Get name and contact details and proceed by asking to be put through.