Bad receptionists and bad service

I recently took my car to Service, where it was bought in Rustenburg, but the did not reset the Service warning on the car. so i called called VW and they advised i can go to any VW dealership so a Service Technician can reset it for me, but when i got there at the service reception two coloured ladies gave me an attitude and told me they cannot assist as it was not serviced at their dealership