Not even sure how to word this

I cancelled my DSTV some years ago. I then app**** for DSTV Streamer but that was a disaster. So I do not have DSTV. But on my credit score it shows I owe DSTV money. I then phoned the call center, I was tolled I owe them over R3000 but they could not say why I owe them so much money. So please can someone inform me how you say I owe you R3000 plus but you can not say why. Not sure what you are doing thee days because no one phone me no one contacted me no one informed me of this. not sure if this is the new **** on how to get money out of people but seriously it is unnecessary. I really hope someone can phone me and explain this.