LATE COMPLETION OF LITTLE REPAIRS DONE ON MY CAR

I WAS INSTRUCTED TO SENT MY CAR FOR INSPECTION ON 23 OCTOBER 2015 AND ON THE 29 OCTOBER 2015, THEY CALLED ME TO PAY HALF OF MY ACCESS FEE OF WHICH I DID PAY THE FULL AMOUNT OF THE ACCESS AS PER MY INSURANCE . ON THE 9 OF NOVEMBER 2015 I WAS CALLED TO SEND MY CAR FOR REPAIRS AS I WAS TOLD THAT THE SPARE PARTS HAD ARRIVED . FROM THERE ON WARDS, THERE IS NO FEED BACK , I HAVE TO KEEP ON CALLING THEM EVERY NOW AND THEN TO CHECK OF WHICH THEY PROMISE TO GET FEEDBACK FROM THE WORKSHOP AND COMEBACK TO ME, OF WHICH THEY NEVER DID. YESTERDAY I CALLED AND WAS PROMISED MY CAR WAS AT THE PAINTING SECTION, I MAY HAVE MY CAR BEFORE END OF THIS WEEK. THIS MORNING I CALLED AGAIN I GOT A DIFFERENT STORY AND THIS TIME I AM TOLD MY CAR MAY BE READY NEXT WEEK. PLEASE HELP I NEED TO SPEAK TO THE WORKSHOP MANAGER AND LET HIM EXPLAIN WHAT IS HAPPENING WITH MY CAR . AS NOW ITS UP TO 3 WEEKS AND I WAS TOLD IT WILL BE READY IN ONE UP TO 3 WEEKS . THANK YOU