Worst online shopping experience I’ve ever gone through

I’ve grown grey hairs following up on the order I placed on the 6th of November and whose terms are 3-5 days delivery. I’ve been following up everyday since the first overdue date and I keep being passed around by customer agents. They just leave each other emails then do nothing about it . They’ve confirmed that the item is in stock and can’t explain why it’s not being delivered. I’ve even laid a complaint and yet still no positive developments. Absolutely no care or compassion from the customer agents , as long as they’ve written an email they’re satisfied . No updates or delivery to the customer. I’ve wasted so much airtime and energy calling these people .