Most ******** service from NMI mercedes Umhlanga

I called to get a price on a B5 service for my C180 Nobody there could give me a price. I spoke first to the reception, then transferred me to the service advisor who said I have to bring the car in to get a quote. So I have to drive 100kms each way just to get a quote, yet the book gives you a list of what needs to be done for a B5 service. I told her that I got a quote from another dealer over the phone, why can't they just give me a quote according to what is required and anything above that we can discuss. She couldnt answer and transferred me to another african guy in the workshop. He as well couldnt give me a quote. Said around 15k. I got quote from another dealer with a B5list for R6500. I questioned him, then he transferred me to another white lady who is just as dumb. She as well could not tell me what is in a simple B5 service and said around 18k. Different from what the guy in the workshop gave.These people at NMI merc umhlanga are the worst people to deal with. They haven't got a clue of how the service intervals work and what needs to be done on an A or B service.