Made to feel like a ********. Possible ***** suspected at this station.

I went to Caltex Cedar Road this afternoon to fill the car. Asked for full tank and paid with credit card. The attendant starts telling me the transaction didn't complete, and I must please pay. At this point I have received an email, a SMS and an banking app notification showing the transaction as successful. I refuse to hand my card over again. By now another attendant has arrived, and is telling me the transaction is reversed and I must pay. I show him the notifications. He tells me the bank does not send notifications on refunds. I tell him they do, but I will show him my bank account. I log into my banking app, and show him the transaction is still there. He tells me it will reverse, I must pay again because it's not in their account. I refuse. I tell him to take my car details, and I will return if the transaction reverses. He takes down details from my license disc and reg number, and I leave. NEVER TO RETURN.