Ecolife® review for ICU• In Cart Upsell Cross Sell

I've been using the "InCart Upsell" app for about 6 months now. Initially, it seemed to meet my needs, but recent issues have entirely marred my experience. For about two weeks, whenever the app's offer is displayed, my website's screen goes completely black, rendering navigation absolutely impossible for my customers. It's a real nightmare for an online store owner to witness such a bug, especially knowing the value of every single visitor. Beyond this major glitch, I'd like to highlight that the installation of the app on the theme is far from intuitive. I spent a lot of time figuring out the process, mainly because there's no tutorial provided to guide users. For a paid app, this is simply unacceptable. But the most frustrating point remains the customer service. Every time I've attempted to address the issue, I've been given the same answer: "The issue will be resolved." Two weeks later, I'm still waiting for a solution, while my customers encounter a black screen and my conversion rate plummets drastically. I'm genuinely disappointed and can't recommend this app in its current state. I hope the developer takes this feedback seriously and works swiftly to improve the user experience.