Disrespectful treatment by manager

I took my Ford Ecosport for it's first service to Ford Silver Lakes. I have been in contact with Kleinbooi re a cover for the spare wheel located on the back door, since the day I made the purchase of my car. He said he will \sort me out\" today when I visited the branch. Upon arrival to collect my car at approximately 14:25, Kleinbooi was nowhere to be found. I went to the manager, Chris, to request his assistance. To make myself VERY CLEAR, I was not there to accuse or hold the manager accountable. I just requested some help. He said that I should have brought this under his attention sooner, to which I agree. However, my son and husband was present and THE WAY that Chris spoke to me was inappropriate and disrespectful. He raised his voice and interrupted me everytime I tried to explain the situation. I left there hurt, disappointed & the problem was not resolved. Personally I think Chris was upset after the branch made a mistake when I first bought my Ecosport. The deal went sour for Silver Lakes due to a mistake made by one of his employees. He made it VERY CLEAR that he will not help me & takes NO responsibility for promises made by staff. He was UNPROFESSIONAL & DISRESPECTFUL"