What the actual!

Tuesday evening I walked down to the local dairy, I've been there heaps of times. I asked for a vape refill, took him and wife ages and came out with one not even in the package? As I was about to pay, he snatched my card and asked my name?!!! WTAF? Refused to give it back, I told him to hand it back and how would he know my ferkin name as only my last name on card. I said 'forget it, I'd rather walk to the next dairy' He gave it back eventually and said he had every right to protect the community???? Then a discount....Nope you twat! Never going there again!