when your ringing always after your pleasantries - hello im from ....window cleaning etc, ask for the person responsible because secretary's and employees will nearly always pretend to know everything and say we dont need a cleaner we got one etc and you wont get very far, managers are always easy to chat too, or so i have found, i do alot of ringing, and when you dont get job because they have cleaner etc, ask for name and send portfolio in still - it can bring work in months, years later!