Pathetic service by TAT SKY.... Horrible

My tata sky subscription no. is 1080615337
I have taken tata sky connection from last 2 months, from this Monday i.e 25th June'12 my connection is not working and called them the same day to complaint.
Call center agent promise me that they will send their technician next day morning. nobody turned up. When i called them during evening hour complaining that problem is still unresolved, other call centre agent told me that request for the technician was not taken by the earlier agent, pathetic.
Ok further he took the service and another promise to send someone to resolve the issue was done on 27th i.e today at 3pm, i called them again at 3-30pm to inform them that nobody has turned up till that moment..after long argument and speaking to supervisor manager they promise me that technician will come to my place by 7pm and imagine NO ONE TURNED UP, that is the heights of service deficiency....I want my installation cost to be reimbursed back to me and don't wish to continue with such service provide who doesn't value the customer.....

I didnt expected this kind of disappointing, pathetic and horrible service from a TATA company...