Unauthorized payment agreement

I am a member of Virgin active I use Horizon view club mid October 2019 I heard about the promotion for the kids so I spoke to one of the consultant. He said to me they are running the promotion for the kids start the gym in October 2019 and then the first payment will be in January 2020 I bring the documents for my son, he registered him after he gave me the card and when I ask him about the contract he said there is no contract because he is going to be under me. End of October the debit order went through I phoned the consultant he said no they are going to reverse that money that was deducted because my first premium will be in January, I did reverse that amount but again this month the debit order went through I was also phoned by the head office that I have missed premium for October I told them the side of my story and I was told to phone Horizon view club. I did phone the I spoke to Julia from Admin and she said they are going to give me a call before the end of the day, the consultant Vusi phoned me and it was now my word against his word I told him that I did ask for the contract you told me that there is no need of the contract because he is going to be under me even when I asked you about the first premium you said on the 25 January 2020. What I hate he **** to me now he pretend as if I am the one who didn't understand and he told me I am the new member of which my membership is more than 2 years.