Poor service

My car device has been faulty for 8 day now I have lodge the call last week Saturday and I was told no technician is available for this week it's can be done on today at 12 o'clock ,than at 12 o'clock I called the schedule department I was told the time has been moved to 3 o'clock mind due I cancelled all my plans for a day ,than now its 3 o'clock no technician no calls.