They've lost me as a customer

On Sun 30 June a friend & I went to Exclusive Cafe in Rosebank Mall. We asked for bog standard filter coffee while deciding on lunch. Sitting at the counter, we noticed a waiter straining coffee through a complex series of processes into a glass beaker but didn't realise that it was OUR coffee being \brewed". After 10 mins we were presented with the strange coffee which was luke-warm. We asked for it to be heated up but were told it came like that. We asked again that they heat it up & saw our waiter take it to the barista (who said it wasn't possible to heat it up) so it was left standing to one side. After another 10 mins we asked for our coffee: the waiter reiterated that coffee was supposed to be served like that. We wouldn't accept it and found the waiter arguing quite forcefully with us. We decided to leave before being completely frustrated but were surprised and angry when Exclusive insisted on charging us for the coffee we hadn't touched."""