Forked Again review for Zepto Product Personalizer

I thought this app was a good choice, but it blocks the ability for customers to use a discount code -- something they don't disclose. Found this out during a major promo. I was told by their support to install another app and that would fix the problem. Nope. Worked fine at first and then stopped working, No fix from support. No help. Just a runaround and bunch of excuses.