If you have been denied credit and therefore can receive a free credit report is it lawful for them to charge you for a credit score even if you do not want it?

All three agencies charge you for receiving your credit score, but they're not supposed to do it unless it's requested by the consumer, any more than a comapny should send you an item you never ordered. I'd call the agency in questions and explain that you did not order your credit score and request the charge to be refunded.