Poor costomer service by Hyundai Edenvale's Manager

On the 1st Of February I took my car in for a service at Hyundai Edenvale. I dropped off the car at 07h30, all was inspected and well. At 16h30 I collected my car and was impressed with the service received and attitude, for a change. The impressive was short lived when less than 20 minutes of leaving the Hyundai Edenvale's service department, I pulled down my sun visor mirror (driver's seat), only to notice that it was shattered. I immediately called the service department and requested to speak to the manager. He, Spiroh is his name, asked me to brig the car in so he could see what I was referring to, which I did the very next morning. After a few failed attempts to take responsibility, he promised to order the mirror. I had to call him, requesting an update after his deafning silence. He told me he's waiting for the mirror order and he will call me. On Thursday, 1 March, it will be exactly a month since the incident and I still haven't heard from him. Whenever I try to call him, I an conviniently told he's not available and not even once has he returned a single call, dispite me leaving my contact details. Please intervene as this matter is becoming a pain in the but. Thank you.