Incompetence

I noticed that my Hilux double cabs' clutch was slipping so I contacted CMH Toyota Alberton for help on Thursday 02 July 2015. To make a long story short, It was decided it was a valid warranty claim and was asked to wait until Wednesday to bring in my bakkie, which was at Cmh Toyota all day and stripped only to discover they had the wrong part and could not fix it. I came to fetch it and was made to wait for it another 30min after it was promised to be ready at arrival. They said they would reorder the correct parts and I could bring it in on Friday 10 July. On 9 July I was informed that they still have not received the part and I would be informed once it was delivered. I have also left two messages for the service manager to contact me but surprise no return contact has been made. I use my vehicle for work purposes and I have already lost days worth of work because of this problem and also taking it in without it being fixed just because someone was *********** in ordering the correct parts. Now I have to take it in again for a day hopefully to have it fixed that is if they manage to actually get the part. Why must I be so inconvenienced and why does this take so long to fix?