2degrees ripped me off. Here's how I got my money back

So I purchased an “add on data pack” for $50 in the middle of March. (I have since learned of 2degrees' data clock where you can get a free hour of wifi, but at this stage I was a data-buying newbie). Next text: “The auto renewal of 15GB Data Pack has been stopped.”And yet, I was then charged for an additional data pack in April, and then also in May. According to the 2degrees phone rep, because I hadn’t stopped the data pack from rolling over once, I had actually agreed to buy it for a further two months. So I took NZ Telecommunications Forum (TCF) chief executive Paul Brislen’s advice and took my issue to the Telecommunications Dispute Resolution Service (TDRS), the industry's own dispute scheme.