Diappointing service from DSTV

I am very disappointed with DSTV. I rented a movie "Transformers:Rise the of the beasts" yesterday afternoon. The movie wasn't available for viewing although the money was deducted from my account. When I called the call center the lady who assisted me was able to load the movie. My son watched it for about 45 minutes or so before deciding to go to bed. From what we both know the movie is available to watch for 48hrs. This afternoon when he tried to finish the rest of the movie it wasn't available for viewing. When we called the call centre again we were told that the movie is only available for viewing once. Neither myself or my son were aware of this and it seems neither was the call centre agent as she had to speak to her team leader to find this out. My son didn't even finish the whole movie yet I have to pay for a movie he did not finish. This information of the movie only being available for viewing once isn't even made known. I have rented movies on Box office plenty of times and this is the first I am hearing of it. I will never rent another movie again and Im seriously considering cancelling my account all together.. Dstv is just getting worse and worse.