Article and rant detailing my extremely negative experience with business account opening and network gear order on Amazon, covering difficulty in getting customer support, difficulty setting up business account, difficulty reporting potential security issue, shipment of second-hand open-box devices instead of new items, Amazon's refusal to send replacements, problems with the process of used items collection and associated refund, barrage of auto-generated emails, zero customer care, my subsequent decision to shop local, other details, and more
In the UK if the goods were over £100 and you paid via credit card, you could raise a Section 75 claim with the card issuer under the Consumer Credit Act.
I used to work for a large train operating company and the sheer number of people contacting us for historic departure info to support a Section 75 claim because the news came out that someone got a 50% refund on their season ticket was astronomical.
Alternatively… Small Claims Court. Amazon will drag you through the coals if you go the chargeback route.