Charging for Mobile device which is inactive

Hi.<br> <br> I've been billed for a second mobile device. I've reported my 1st device ****** in Aug 2013. I only go a new mobile android device later. On my online profile, my 1st device(Drifta) is marked as Inactive. Which means that is no longer usable. However Multichoice claims I'm being billed because I have 2 devices on my profile.<br> <br> I did phone them and have a reference number, 2 weeks ago. Nobody phones me back and when I phone them they are offline. I've been billed R49 for who knows how long, as their account system can only go back until July 2015. This is not acceptable and trying to fix this is getting me nowhere.<br> <br> Useless, and I keep on paying.