EASTVAAL MOTOR CITY WITBANK - REPAIRED ENGINE VEHICLE SOLD UNDISCLOSED

I purchased a second hand Ford Ranger bakkie at Eastvaal Motor City Witbank in May 2018. I have now had the bakkie for just over a year and the engine has gone. We had it at Eastvaal and they said to replace the engine would run at approximately R 130 000.00. we then took the bakkie for a second opinion and it was discovered that the engine had be repaired before and resold to us without this information being disclosed. I phone Eastvaal to complain about this as the insurance policy that you take out on the engine when you purchase a second hand vehicle only covers to a maximum amount of R 30 000.00 My complaint is that surly after a year of having a vehicle and the engine has gone, there is something that should be done by the dealership?