unfair service delivery

I am really disappointed in the service I received from Game stores in Ballito, I went there on sunday 6 December to purchase the Openview HD, which I paid R1200 which includes the dish and installation , I was advised that the technician will come on Tuesday to do the installation, Wednesday afternoon nobody came I then decided to call Game in ballito to confirm when will the installation be taking place I was then told I was supposed to call the technician myself I then said when I did the purchase on sunday I was not advised or given the number for the technician to call, the guy then said he will get the technician to call me , the technician then called and said he just received the job card from game on Wednesday and he can only come on Friday , Friday no one came to do the installation I then called the technician more the 3 times and each time I was told they will come and installation by the close of business ,still no one has come, I feel this is very unfair and selfish by game for not doing a followup for customers as this is your appointed technicians and I don't think this is how you treat all your customers, I need a speedy response as to when installation will b done