DSTV useless!

i purchased a DSTV explora on their price lock promotion a little over 2 years ago.... for R899 a month. when it came close to the end of the 2 year contract i called dstv and asked them when it will be the end of the contract. got the date and a month prior i called to cancel when the contract ran out. they confirmed everything. i was then billed the following month and i reversed the debit order on the 1st of december. we installed internet therefore when my subscribtion was meant to end we started streaming and didnt even look at the dstv decoder. anyway today (on valentines day) i got called from the lawyers that they have handed me over for collection. dstv failed to inform me about this prorata charge number 1. number 2 they failed to inform me that there was anything outstanding on my account. they had perfect opportunity when i called them on the 1st of december 2017 to inform them that they incorrectly debited my account and that my account is cancelled. i also asked them whether or not there was anything outstanding and they said no. i have tried calling their call center only to be given the incorrect contact details for their accounts department which is no suprise because of how ***** dstv actually is. weldone dstv you know how to put a bad taste in peoples mouths.... first by over charging people that use your services then by trying to be ***** and get extra money. pity i cant give a 0 * rating