Honda no parts, disaster for SA

I took my bike to be serviced at Honda Sandton. All my bike requires is a service, spark plugs, air filter, back brakes. Second day still waiting for them to get stock. As a service centre you should stock parts. No courtesy call to give updates, I have to call a couple times a day to get feedback. They not even sure if they will have stock tomorrow. No one in service department knows when stock will arrive. Should an establishment like Honda have better control and insight on their products. I find it interesting their competitors are able to provide service to their client requiring the parts my bike needs and service their clients on the same day, why does Honda not keep stock of general items as listed above. This is absolutly appalling for a brand like Honda.