Poor Service from Cencar Bosch Centurion

Since Tuesday I've been getting false promises about my car repairs. I called on Tuesday to speak to the Manager Carlo du Plessis who ignored my message. I was then promised Wednesday, yesterday, only to be told at 4pm that my car is not ready. I again requested to speak to the Manager and he ignored me for the second time. Today is exactly one week my car is at Bosch and I get here at 9am to be told they are waiting for a part. This is the level of unprofessionalism from Cencar Bosch Centurion and a Manager who does not return messages. I did not expect this bad customer relations and false promises from Bosch. They are not cheap so there is an expectation of better service standards from them.