We disconnected our DSTV

We disconnected our DSTV. Then received a message from a legal company saying we owe money. We contacted multichoice enquiring about what this is for. We got 3 different answers of what it might be. We requested an invoice and statement which not DSTV or legal company can provide. We are still getting threats of being blacklisted etc. But no one can tell what it is for you just have to pay. You can't even send emails to complain you have as there's none. This is why they in financial crises and trying their best to just get random money from people. But you can't ask what it's for and it is no one's job to supply this info. Pathetic, consumers be careful when disconnecting.