Upset customer

I'm very disappointed with DSTV, I was wrongfully subscribed 4 showmax, only found out on Thu when they sent me my amt due, when I phoned 2 rectify it they only refunded 1/2 da amt. When I asked abt da rest I was told until they investigate, if I want 2 watch I mst pay what's due. If I don't pay the full amount I will be disconnected and who must pay the reconnection fee? The best part is they acknowledge that these wrongful subscriptions do happen so why not find ways to resolve them without inconveniencing the client? I even suggested if upon they investigation they find out I did subscribe they can add it to my next bill but until they they should refund my full amt but no they can't do that.