Bored

So I called multichoice sometime last year around July if I'm not mistaken to cancel my services till further notice, I've been getting calls since last year October that I owe R600 something that I need to pay immediately. DStv it's a pay and watch program ryt. How did I end up owing R600 ..the last consultant was rude a guy by the name of Brandon if I recall correctly... how did it go to R600 I think I owe them R200 something....I asked him to tell me hoe he said he'll send me some statement he failed to tell me the reason.... he's so rude