Unacceptable Service

I had sent my car (Toyota 86) in for a service last year(July 2015) for 30 000kms and was told that there was a warranty recall on the LEDs. The service advisor contacted me to bring my car in a few days later, only for me to spend 4 hours at the dealership without the repair being completed. I was told the incorrect part was ordered. I was informed that the dealership will contact me once the correct part was received. This never happened, and when I took my car in for a service on 26 February 2016, the service advisor informed me that I will be contacted the next Monday to inform me when I can bring my car in as there was no stock in the country. I am still waiting to be contacted and it has been over a month. Considering it has taken almost a year to resolve this, it has become frustrating to deal with Vaal Toyota Sasolburg. I will not be taking my car to this dealership for a service going forward.