Free Shipping Promo Code Confusion

[drchad]

Hello Everyone, hoping you can help me with a recurring issue we've had for several years with our Prestashop store.  

When we run promo codes that involve a percentage off plus free shipping, the shipping price is still displayed in the cart summary for the customer after entering the code. The shipping cost is being deducted properly and added to the "vouchers" line, but many customers don't take the time to do the math and think they are still being charged for shipping. 

For example, if we run a promo code for 15% and free shipping , and a customer adds $100 of product with $10 shipping then enters the code, the cart summary will still show the $10 shipping, but in the vouchers line it will show $25 savings (which is accurate) but often confusing.  

I'm wondering if there is a way to change the shipping cost to $0 or display text saying "Free Shipping" or some other similar solution, rather than transferring the savings to the vouchers line. 

Thank you in advance,

Chad