Keep taking money using different accounts

I joined their gym in Vanderbijlpark but relocated within a month of joining. I indicated that I would not continue with them but they come into my account whenever they want with different debit order accounts. Even after reversing them with the bank, which gives them a clue that you are no longer interested, they keep coming into your account. When I call to cancel, they say they will not cancel until I pay R 2000. Mind you, I never even gymed once. This behavior gives **** vibes. You realize that a customer is no longer into you but keep on bullying them in the most justifiable way you may put it. No company has ever bul**** me like this. What annoys me the most is seeing another customer reviews them here on hellopeter and all they could do was respond with some kind of defensiveness and an act of justification, as opposed to most proper companies who humble themselves and solve queries for their customers. At least this review is the little I can do to show how '****ming' they can be, and I'll keep reviewing in different platforms.