Contract cancelled without reasoning or knowledge

VODACOM CANCELLED MY CONTRACT WITH THEM AND CANT SEEM TO EXPLAIN TO ME HOW IT HAPPEN OR WHO DID IT ALL MY FREE MINUTES HAVE BEEN LOST AND NOW IM ON PREPAID . WAS TOLD TO LODGE A COMPLAINT WHICH WILL TAKE ANYTHING BETWEEN 6-8 WEEKS FOR AN ANSWER *** !!!!!<br> <br> TERRIBLE SERVICE AND ATTITUDE FROM THEM NO COMPENSATION FOR LOSS OR ANYTHING LODGED MY COMPLAINT AND NOT EVEN SINGLE CALL OR SMS ON PROGRESS SO FAR