Regret always comes too late.. Very angry buyer

I'm fuming with rage and anger. I bought a vehicle at WBC in Brackenfell on Friday 13 Oct 2023 on auction. The sales person was very nice there but when we asked him if the car is still in good condition he was extremely confident and assured us that it is. Pushing for the sale to be done and paperwork to be signed not once did he disclose to us the full Dekra report. Mind you this is our first time buying from them so we not clued up and besides what was shown in the ad re- the minor roadworthy issues. Car was paid in full, no time for test driving as I arrived just after 5pm and they close at 6. I completed and signed paper and off we went. Not once did the sales guy check the car for water or anything before we left, and not even mentioned that he didn't and that we had to. We were about 15 min away from their shop and the car died and overheated. We were unable to get the car to start again. We towed the car back to there shop same night and left it for them. The next day we went back to speak to the manager and he says that under the full Dekra report it showed poor cooling system. The car was taken to a nearby Auto Mechanic workshop on Monday 16th Oct to be checked at my expense of course. The manager at WBC said its out of their hands now. The mechanic calls me to tell me not only did the car overheat due to the poor cooling system the head is blown as well.. Which is now gonna cost me about R20k atleast.. They basically sell you something that they know is going break very soon just so its off their shop floor. Try selling that car back to them then you will see what you get in return. I really pray God deal's with these untrusted and ****ming people. This is not how we conduct business. How many more people will fall prey to their lies and schemes.. Please people let me be the last, don't trust this place for their low pricing and good deals you shall surely suffer after that.. I pray what they sow they will reap..