Cancelation of my contract

<p>So I had a problem with CELL C by updating my contact in the beginning of the year so I cancelled my contact with them 4 months later and they keep calling me to tell my my account is outstanding. I'm so sick of cell c that if I get 1 more call from them I will open a case as they don't do there work . I DARE YOU CELL C TO TAKE MY MONEY OR TO CALL ME </p> <p> </p>