If you don't like it don't come back

Went to roast cafe melrose arch ordered salad for R98 asked for additional dressing and DID NOT HEAR WAITER SAY EXTRA CHARGE. When we quiried the charge and validity thereof the manager was rude,dismissive and told us don't come back if you don't like it. No interest in retaining regular customers and basically leaving us with a bad feeling and resolution to never go back there. AWFUL EXPERIENCE TO BE SPOKEN TO LIKE THAT.