Unable to perform repairs correct and on time.

First my car was send to Nissan to repair a roof leak and my cruise control, later that day I was phoned to say that they had not attend to my car and the car has to stay over. The next day I picked up my car and paid R700 for the roof repair and cruise control. I paid it as they never phoned me to tell me how much it was going to cost. Only after I found that the roof was still leaking. I took the car back for a humming noise, the right back door doesn't open and for them to look at the roof again. I was told that the humming noise is road noise from the tyres suddenly and that my mags was a recall as they ordered new ones, they tried to fix the roof again and wanted to charge me R900 to remove the door panel to see what is wrong so I told them to leave the door. Afterwards I found that the roof was still leaking, so I waited for them to make the booking for the new mags. I decided to remove the door panel myself before taking it back to Nissan. Now on the 02/02/16 they booked my car in 7:00 for the mags and door, by 16:30 they phoned to say that the car would not be completed. This was unacceptable by me and collected the car at 17:00 as the door is still broken.