Charged for service not used

I have had DSTV for a number of years and disconnected the HD PVR in October 2015 and in December 2015 requested the HD PVR to be connected for a few weeks until 31 December 2015. I paid an amount of R210. When I returned home from holidays the DSTV was still connected. I requested them to disconnect. I was then charged for the month of January 2016. I refused to pay as I had requested disconnection. I also have a dual view and paid for the dual view. DSTV suspended this as there is still amount outstanding fro the HD PVR. I then told them I will not pay anymore and will never reconnect. My husband also has DSTV in his name for our guest house. In December and January he requested disconnection as nobody was at the guest house. We have not reconnected as the guest house is not being used and is under renovation. When he app**** for vehicle finance he was adbvised by the bank that DSTV has blacklisted him on credit bureau. DSTV advised that we had used the DSTV even though we did not pay. What we cannot understand is that DSTV disconnets for non payment so how come the DSTV was still connected, The package ius R99 and we now have to pay R550 to clear his name