I agree, they do not look like EEs, more like Ayam Cemani which came to mind when I saw the pics. Both looks to be pullets. 2x Ol Grey Mare, she more experienced in recognizing are.
It's disappointing to find out what you purchased isn't want you asked for. At the same time they are your first set of chickens and it's a good learning process. You could call the breeder/seller and express your disappointment but I doubt they'll do anything. You could sell them and start over, I understand the disappointment but it's "an adventure". Keep us updated, which comes the crow or the egg