Selling chocolate that is a month past Best By date

I was shopping at ABC SWEETS when i noticed this big box of chocolates that are being sold past Best by date. The date displayed was December 2017. I approached the owner to notify him that tje items were expired. He asked whats expured and I told told him. I thought i was doing good will for letting him know. He immediately became aggressive and stated he gas a licence to sell these goods. I told him that no-one has a lucence for selling expired Goods. and informed him I would report this.