Poor Customer Service from BMW Sandton Auto and BMW SA

Hi, My car went in for service on 24 July. I was assigned to a service consultant but unfortunately she was not able to attend to me personally and someone else was providing me feedback. there were some parts that needed to be ordered and I only got the car back on the 26 July, which was not an issue for me.Unfortunately I was not able to fetch the car on the 26 July, but luckily I was accommodated to fetch my car on the Saturday 27 July. I was hoping that someone was going to take me through the invoice / services was done but I was just handed the key and told that the service consultant will give me a call and send me the information on Monday the 29 July. I did not receive any call. On 1 August I got a courtesy call from the BMW Sandton Dealership asking how my experience was. I told him that I am still waiting for the service consultant to give me a call and to go through the service with me and after that I will be able to share my experience. The guy said that he will let the service consultant give me a call. No one called even though I called the BMW Sandton offices a few times leaving messages that I should be called back. On 7 August I called BMW SA and shared by frustration a case number was opened. Unfortunately it was also a struggle for BMW SA to get information or then to get someone to give me a call. I had to also follow up with BMW SA to find out how far the process is. Just to find out that my case has been assigned to another BMW SA consultant. I finally received my invoices via email on 16 August after I called BMW SA again. There was no information provided in the email, not even a Good day or even an apology about the fact that the invoice was only sent to me now. I have been a client of BMW for more then 8 years and I really expect more from such a Global Company.