Mystery Account

I recently received a text message from "Onair TV" saying that my account is in arrears and that I've been handed over. The thing is, I have no idea where or when I did business with Onair TV. According to the messages I've been sent it is related to by DSTV explora, however according to Multichoice, my DSTV account is up to date. I'm not sure if this is a ****, but I'm really concerned, especially now that I have been handed over. As far as I'm concerned, I' ve never done any business with Onair TV.