we debit as we wish

So after changing my debit date with DSTV, I was advised of the pro rata etc. Then on my debit date 2 amounts are debited, R1103 which I was advised and an additional R135, which I was not aware of, then when calling (three times) to find out what this R135 was for I am told it is for my boxoffice account, I disagreed as I pay for my rented movies via credit card immediately, I then send my bank statement proving that I pay via credit card, I then get no response whatsoever, I call in again to get told that this was for movies from April 2014, a whole year later, am I suppose to accept this explanation simply because there is no explanation, please can I have my money back thank you,