Netflix "HELP" deducting R599 p/m from my account for no help/service

I registered for Netflix and expect to pay R99 per month as advertised. I enjoy the service however, I had issues signing in and clicked on "HELP". Without any support/assistance given, they deducted R599 from my account. I am a pensioner and that is half of my income :-(

Unfortunately I am not very PC literate and have accordingly tried to get the debit order cancelled at my bank but they are unable to do so without Netflix cancelling the debit order. It has now been 6 months (if not longer) that I have been trying to get this sorted out and in the meantime they are still deducting R599 per month from my account.

Can someone PLEASE help me with this. I am incredibly traumatized by this experience and find it very stressful as I do not know how else to get this sorted.

This is terrible service and ********.