coupon applies but doesn’t remove the price

Hello,
I’m riching you because your plugin is still the best, I tried to contact you on your website but I wasn’t lucky enough to recieve and answer,
we have an issue. the coupon works perfectly, the problem is if we add the coupon and leave the page, and then try to buy the product again from my subscription page, when it goes to checkout it give the message “The coupon “X” was applied to your order”, it shows in the order table, but it doesn’t remove the value. is there anyway, any code. to remove the coupon code if we goes out of checkout page, or someway to fix this issue?
I tried my best to find a similar plugin , I also bought automate woo as I consulted the woo subscription team, with some plugin you can create a weekly subscription and then remove the first week, on second order it will update to monthly subscription etc, which doesn’t work as if you don’t apply the coupon you need to pay for a week and then a month…

I really appriciate if you could help us. we are willing to pay if it’s necessary.
hank you