CELL C IS USELESS

I HAD RICA`D A CELL C SIM CARD ONTO MY NAME FOR THE BUSINESS BECUASE THE OWNER WAS NOT AVAILABLE AND NOW THAT I HAVE LEFT THE COMPANY I WANT TO HAVE MY NAME REMOVED AS I NO LONGER KNOW WHAT THEY ARE DOING. NOW I HAVE TO VERIFY DETAILS FOR THIS MONTH ON THE SIM CARD AFTER I LEFT THE COMPANY 3 MONTHS AGO--- HOW THE FUDGE MUST I KNOW WHAT THEY HAVE DONE WITH IT??? USELESS SHOULD SOMETHING ******* HAPPEN AND THE COPS COME AND KNOCK ON MY DOOR I WILL REVERT THEM TO CELL C FOR ANSWERS SEEING AS CELL C DOES NOT WANT TO HELP ME.