I have found a marketing company (Valassis) that I want to work for. I don't have any experience in the marketing field, but I do have about 15 years of retail and counsultative sales experience. I am currently a top producing retail consultant, who is great at building relationships and problem solving. I would welcome any suggestions, as to how I may get a foot in the door, even if the position is not in sales. Thank you.

you seem to have the right idea.
even if u have to work as a receptionist you can still get your foot in the door. if you have the skills you can easily move your self way up.