Poor service at its highest form

I have bought a 2009 Corsa Utility vehicle at WeBuyCars Brackenfell on the 8th of November and collected it on the 9th of November. The sales guy only told me that the vehicle only needs servicing. Upon collection on my way home the car was cutting off the engine (while in motion), and mind you I was never told about that defect before I bought the car. The problem persisted and the sales guy Ryan told me it’s fuel issue I have to pour more petrol which I did, then the car didn’t start at all and I had to return the car to the branch (I towed it with my own money by the way), then they told me that they have fixed the car, I then collected it, but the issue persisted and I had to return the car again (towed) because it didn’t start. But since then I haven’t received any communication from them till to date for the car I bought in November and today is the 8th of January 2024, and I never drove the car properly. I went to the branch on Wednesday (3rd of January 2024), and they told me the car is still with the mechanic. But I requested for cancellation now and I was told that I have to wait for the 8th of January 2024 and I haven’t received any communication with regards to that. I’m so disappointed, I bought that car for my business and I haven’t been operating properly due to this issue. WeBuyCars is the bottom of the barrel.