Aftersales service appalling

So I've just bought a car from WeBuyCars and as its been driven out the premises the check engine warning light comes one. We return the vehicle the next day and the onsite tech reset the comp and says no the battery must be replaced - R3000. The next day the check engine warning light comes on again and we return it to the branch and the tech resets comp again and the warning light returns at the next stop. We are advised by branch salesman to log a concern for repair. We get a repair quote and are now being told to wait 72 working hours, thats nearly 2 weeks. I am not from durban I'm from cape town how am I going to return to my family? do these people even care or are they just running a fulltime ****** business!!