OB Kollonaded - NOT on par!

I visited OB Kollonade Mall, Pretoria for a second time last night. The first time I received prawns which were uncleaned. I brought this to management's attention. Last night, we AGAIN received prawns which were uncleaned. After bringing this to management's attention, we received new plates with the promise that these prawns will be clean. However, both I and my partner's prawns were once again uncleaned. I notified management who apologized, however, did little to restore the situation. Upon receiving the bill I informed the waitress that I will not be paying for the meal as I could hardly eat it. The manager, Eugene, however, insisted that I still pay for the prawns I did eat (which would be understandable) did I not receive such bad service. In the end, both the manager and our waitress had treated us stiffly and with attitude. This is not the OB standard I am used to. And I will most definitely not visit this OB again.