I would like to know if it s possible to refuse a transaction
We have a website that use vouchers/gift cerficate (eg $100) and coupon (eg -15%). Our website is on Version 126.96.36.199, so we are using the voucher system of opencart 1.5 and the regular coupon system
Into the shopping cart, the customer can apply a coupon and a voucher on the same transaction.
Is it possible to block a transaction that have a coupon and voucher
Example customer write his voucher code, and after write his coupon code the system refuse the coupon with a message : voucher and coupon can not be combine on the same transaction.
Please let me know if one of you have already setup a similar configuration or an idea how to do that
Thank you in advance for all your help