Poor service/ Questionable business practice

So a week ago I reserved Premium sedan with Europcar at Wonderboom Airport. Confirmation received on the same day. Collection confirmed for 8h00 today. At 7h30 I receive a call from Europcar advising that they do not have the reserved vehicle in their fleet and offered a standard vehicle instead. If I wanted a standard vehicle I would have reserved one. Walked into First car rental Pretoria at 9h00 and they provided me with the vehicle I wanted at a better rate than Europcar.