Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Product, bad seller

I had the worst customer service experience with Adgtron. I asked why it took two days for my item to ship and got a sarcastic response from their customer service department not once but twice. Instead of apologizing for not shipping sooner, they made excuses and quoted Amazon's shipping policy. The policy say 2 business days after shipping, not you have two days to ship. The response was as if the product was free or they were doing me a favor. DO NOT use Adgton.