ENGINE SIEZURE DUE TO ENGINE REPAIR

I BOUGHT A MERCEDES BENZ C63 S 2016 MODEL ON THE 22ND OF MAY 2018 WITH 19000KM FROM WOODMED. I TOOK THE CAR FOR SERVICE ON THE 20TH AUGUST 2018 AND PICKED IT UP THE SAME DAY AND PARKED IT IN MY GARAGE AT HOME. THE NEXT TIME I TRIED DRIVING THE CAR OUT OF MY YARD THE CAR SWITHCHED OFF AND DID NOT MAKE IT OUT OF THE YARD. THIS WAS ON THE 25TH AUGUST 2018. THE CAR WAS TOWED TO MERCEDES EASTRAND WHERE THE SERVICE WAS DONE ON THE 20TH. EASTRAND SAID THAT THERE WAS A SERIOUS ENGINE REPAIR THAT WAS DONE (NIEL GOLD THE SERVICE MANAGER) AND THIS SERVICE/REPAIR WAS DONE IN FEBRUARY 2018 BY MERCEDEZS BENZ WONDERBOOM AS PER SERVICE RECORD. WOODMEAD AUTO DID NOT ADVISE ME ABOUT THE MAJOR ENGINE REPAIR. I CONTACTED WOODMEAD AUTO IN WOODMEAD AND MET WITH THE OWNER AND WAS PROMISSED A NEW CAR AS A REPLACEMENT AND THIS HAS NOT HAPPEND, INSTEAD WOODMEAD AOUTO WANT TO BLAME MERCEDEZ BENZ. EASTRAND THEN REFUSED TO CONTINUE WITH THE CAR AND GOT WONDERBOOM TO COME AND COLLECT THE CAR. WONDER BOOM THE TOOK THE CAR TO MERCEDES BENZ AMG IN MENLYN. MENLYN ALSO COULD ASSIST. WONDERBOOM THEN TOOK BACK THE CAR AND ADVISED ME THAT THEY TAKE RESPONSIBILITY FOR THE REPAIR. THEY CLAIM THAT THE WILL REPAIR THE CAR (SAID SERVICE MANAGER VICKY). I DO NOT WANT A CAR WITH A MAJOR ENGINE REPAIR. i WANT ANOTHER CAR(SIMILAR) WITH NO EGINE REPAIRS WHATSOEVER NOW. I WAS SOLD A CAR WITH UNDER THE PROMISE THAT THE CAR HAD NO ISSUES. THIS IS UNAACEPTABLE AND I PLAN ON TAKING THIS FURTHER.