Dstv failing to assist with disconnecting a decoder not in use.

Dstv can be fastrating. I have two decoders, which from last month I requested that they disconnect one, was told couldn't because my services were suspended. Even after numerous times I tried to disconnect on their self service. Today called again requested that I disconnect while my services were active was told they can't disconnect. So iam now forced to pay for a decorder that is not in use. Again I will fail to pay and will be told same story that they must be active to disconnect.