DSTV CHARGING FOR SO-CALLED REWARDS

I was debited R715 on 1st June 23 instead of R564 for my parents account. I called the contact center on 7th June and I was told that I'd subscribed for a Disney Channel. I then asked her to send me proof of the request and I was promised a call back which never happened. I called again on 29th June and I was told that I had accepted a reward via sms on 24th March for 3 months of Disney Channel from DSTV Rewards. According to the consultant the additional charge of R150 was as a result of not cancelling the reward after the 3 months free period had lapsed. So why was I charged if the 3 months lapses end of June? Who approved the additional charge on the account.