Continues harassment by DSTV.

I have canselled my subscription more than 2 years ago. I paid the amount i was given. No i am being harassed by dstv to pay an out standing amount. I keep on telling them i have paid everything as they said. This is really harasment from them since they cannot proof i still own the amount they said. This is really pathetic service from them and i soooo wiah they stop calling me and harasing me.