Awful experience at Samsung Tygervalley store

I recently had this awful experience at Samsung Tygervalley.

Had absolutely shocking service there, the sales person got furious at me for not planning to buy a phone at that specific moment. As I would just liked information about certain Samsung phones. After a few questions, he asked if I plan on buying a phone, when I said I'm just doing research and thinking about buying secondhand. He argued that why does he have to help me then, and asked for commission on the phone I'm buying or something like that.

I told him that clearly he doesn't like his work, if he behaved like that. Then he got quite angry and I could barely get a word in.

We had quite a verbal exchange, luckily there wasn't any other customers in the store.

Can't believe that he wasn't trained on customer service at all. Or clearly forgot everything.