What support channels reduce abandonment most?

I've been running my Shopify store for two years now, and cart abandonment has been my constant nemesis. We're getting solid traffic from our Meta ads, but something's breaking down in the final conversion stage. I've watched potential customers add products to their cart, only to disappear without purchasing. It's like they hit an invisible wall. Our current customer support is reactive—email tickets, standard live chat—but it feels slow and disconnected. I know we're losing sales not just because of price or shipping, but because customers might have quick questions that aren't getting answered fast enough. The moment of purchase is fragile; any friction can make a customer bail. I want proactive support channels that feel immediate, personalized, and can quickly resolve hesitations. My goal isn't just to answer questions, but to create a sense of confidence that nudges the customer toward completing their purchase. We're talking about turning those 'maybe' moments into definitive 'yes' transactions.