Disappointed in Mercedes-Benz South Africa

I gave my bus in before the lockdown and then I took it again when they could operate again I took my bus back they told me they need to get a part from overseas so I waited but I do not get any feedback I need to phone mail and complaint to hear what is going on. On the 3rd of Aug I went onto their facebook page and ask for help there where the next day I got an mail back telling me that the part will be there this afternoon they said this afternoon not what date just this afternoon well I guest it is an other date this afternoon as to date no part and not feedback again. If this is how they do business I do not want to do any other business with them. It is not how I conduct business and this is not how I appreciate the service I get from others.