Dstv is ****

I woke up with my dstv not playing and my channels all blocked yet I paid.So I decided to use whatsapp to find out what happened and they saying I added channels and so I need to pay .I did not add channels and I only use whatsapp to communicate with them.there is no history of me chatting with them on the day they say I added channels.my question is How did I add the channels?I am so disappointed with this,don't you send sms or call to confirm the upgrade.