DSTV Online movies charged ( double ) and yet unable to view it!

I rented a movie " Black & Blue" on Friday 17 April having an existing online account. From previous experience , when you want to rent the same movie twice , a pop up will alert you to this thereby preventing this from happening. No such thing happened , even after - having made the initial payment- and allowing sufficient time for the transaction to process- resulting in my ending up a. paying for it twice and b. the movie not playing even though it shows ( "rented") Whenever I select to view the movie it defaults to the Trailer. Logged complaints on the " contact us" you have available( your "online chat" coincidentally not available, neither your "Dstv Forum") , but today Sunday 19 April, instead of being able to watch my movie( and getting the replacement for the duplication your system allowed) I get a " movie is about to expire message". I want to know:

1. why your system allowed the duplications. I also want to, 2. be able to actually watch Black and Blue, that I paid for(twice) 3. want an extended 48 hours to view it and, 4.want the replacement(for the duplicate)i.e. "21 Bridges" that I requested please

If not , please refund my money and I can cancel all my subscriptions, in keeping with many South Africans are doing.

Serious questions I am asking :Is this an error or is it another " how to boost our flagging revenue ploy" by Multichoice?