Horrific service!

Last week I went into a Hyundai branch in Pietermaritzburg My boot does not open so I wanted to replace that boot switch. I was requested to come back in on Monday because my vehicle was due for a service anyway. They did their inspecting and advised that they were going to phone Wesbank for authorization as I am using their Fleet card. One of the things they requested authorization on was wiper blades. The ones on my car are brand new and they were replaced last week Friday, 06 December 2019. I don't understand what is it they were inspecting on Monday. The quote was R18,795.00. It is Thursday today and no one from Hyundai Pmb has contacted me with feedback. I don't understand their work ethic. I don't understand why their service is so poor. Can someone address this with them. We cant be ********** like this by people trying to make their target out of us.