VERY VERY UPSET

On the Sunday the 29 November 2015, we had a virgin active representative at church. I joined in the membership after I was told about the cash back offer of R700. If I join in by the 30 November then I will be eligible for this cash back on the 1 February 2016, if I go to gym at least 24 times. I joined, given a card on the Sunday and told I can go to gym the same day. the 02 November 2015, I receive a call from the lady by the name of Wazi from the Virgin active in Northgate, she tells me that their system was unable to debit my bank with the monthly fee of R128 and I must send her a bank statement to ensure that my bank does take debit orders. I did send her the bank statement within 5 min after our call. She informs me that will not be receiving the R700 cash back because my membership will not fall within the month of November, I was very confused. She said they is nothing they can do on their side, they will either give me one month off or give me my initial deposit back. I'm not happy about this situation and I refuse to take it laying down. I will take this up until it is resolved and I'm given what I signed up for. This totally unacceptable