1. Firstly, you need to add 3 items to cart if you want to get "Buy 2 get 1 free". If you just added 2 items in your order, please understand that the 3rd will not be free(You may contact us for the 3rd item for free, but you have to pay the shipping fee for the 3rd item if you didn't follow the rule " Add 3 items to your cart".
2. Secondly, "Buy 2 get 1 free" is an automatic discount code that'll be applied to your order, and in our store, one order can only use one discount. So when you add more than 3 items, the only discount would be "Buy 2 get 1 free", Other Code will not work.