SUB-STANDARD AND UNEXCEPTABLE WORKMASHIP DONE TO MY CAR!

SUB-STANDARD WORK DONE BY Auto and General and renew-it Rivonia. My car has been in for repairs and was told that my car was ready for collection. UPON ARRIVAL IT WAS CLEAR TO ME THAT MY CAR HAS TWO DIFF COLORS WHERE REPAIRS WERE DONE AND A WRONG SIZED REAR BUMPER WAS FITTED IN MY CAR, RESULTING IN UNALLINED AND UNEVEN SURFACE ON THE NEW BUMPER. I AM FRUSTRATED THAT THERE IS NO CLEAR WAY FORWARD ON HOW WE GOING TO RESOLVE THIS MATTER AND I HAVE BEEN WITHOUT MY CAR FOR ALMOST 3 MONTHS NOW!