UNFAIR TREATMENT FROM DISCOVERY INSURE AND REPAIRE

I WAS INVOLVED IN A CAR ACCIDENT ON THE 21ST OF NOV, MY CAR WAS TOWED AND TAKEN FOR REPAIRS BY MY INSURANCE, REPAIRS WERE APPROVED ON THE 29TH OF OCT, I HAVE BEEN CALLING THE REPAIRER (STEVE) EVERY SECOND DAY TO CHECK ON THE PROGRESS AS I WAS AVOIDING THE 30DAYS FALL FOR THE COURTESY CAR I RECEIVED ON THE 21ST OF OCT, EVERY WEEK I WS TOLD I WOULD GET MY CAR BACK THE FOLLOWING WEEK, UNFORTUNATELY FOR ME THE FEAR CAME A REALITY, DISCOVERY FAILED TO EXTEND THE RENTAL FOR ME TELING ME THAT EVERYTHING WAS DONE ON THEIR SIDE ON TIME, BUT STEVE THE REPAIRER TOLD US THAT THEY WERE DELAYED BY INSURANCE AS THEY NEEDED APPROVAL FOR EVERYTHING THAT THEY HAD TO DO. I PAID R1200 TO AVIS WHEN THE COURTESY WAS RECEIVED BUT AFTER THE CAR WAS RETURNED I ONLY RECEVIED R524 BACK AND WAS TOLD THE BALANCE OF ALMOST R700 WAS TAKEN FOR ETOLLS AND TOLLGATE WHICH NO ONE EVER INFORMED ME OF THAT. TO THIS DAY 25 NOV I AM STILL WITHOUT MY CAR, NO COURTESY CAR AND STILL AITING FOR DISCOVERY LEGAL TO ADVISE HOW FAR THEY ARE WITH PURSUING A CASE AGAINST THE DRIVER THAT BUMPED US, I AM FRUSTRATED AND FEEL MY CLAIM WAS NEVER TAKEN SERIOUS AND TREATED AS A PRIORITY. I HAVE TO ASK LIFTS EVERYDAY TO COME TO WORK