Game takes your money without delivering your product.

On the 10th of November I baught a stove from the Worcester branch of Game. When I baught the stove, I was on my way to get a new guide dog in Johannesburg. They promised me that they will keep my stove for 30 days at the store. Last Monday, the 27th of November, I went to collect my stove. They informed me that there is no stock of my spesific stove. I even had to cancel the guy who was supposed to install my stove for me. They told me that my stove will arrive on the 7th of December (which is today.) This morning I called them and they informed me again that there is no stock. My stove will arrive next week. This is unacceptable practice based on lies. So, I had to cancel the installation again. What am I suppose to do?