Misinformed about the billing

I signed up for gym membership on the 08/06/2015 on the day I spoke to Shepherd and he informed me that I should pay R150.00 for the month of June and that the next fee would be debited on the 28/07/2015, I was debited on the 28/06/2015. When I enquired I was told by Shepherd that there was a miscommunication and that he would reimburse me and he would send an e-mail confirming this when I spoke to him on the 30/06/2015. I have not heard from him and would like to cancel the membership and want the R395.00 refunded, since the management is deceptive and apathetic