Where is Virgin Active South Africa's Account Department?

Their account department struggles to debit my account when I activated my Vitality and received a new card. My banking details did not change and they asked for a bank confirmation letter, which I sent them. They still phone me an say my account is behind, as if I am at fault. They have been debiting from my bank account months without any issues, until now. Everyone at the branch says it will be sorted, but the problem continues going for month number 2!