Poor after sales service

I bought a new TUV300 from Mahindra Hatfield. There sales service was good and everything went well. When I went to fetch the new car, the problems began. They informed me that the spare key is with Menlyn. They will get it and let me know when I gen collect. I got no feedback. After several weeks I have been informed upon my inquiry that here is no spare key and they need to order one. Another 2 weeks went by. Then I was informed they have to change the ignition and it would take a day. Yesterday they collected my car, but the car was not ready yesterday afternoon. Today the car still isn't ready. Why do they sell a car without a spare key in the first place and why does it take so long to fix it? It is long weekend and I sit without my car. They gave me a loan car, but it is too small for my family, so we can't do anything together over the long weekend.