Showmax ripp off

I have been using showmax for a few months now and for the month of November I couldn't pay for its service which where suspended and I was okay with that because I planned to reactivate the service begining of December.

I got a shock when I saw that my bank was daily charging me R8,60 for about 25 days in the month of November and upon my inquiry I found that Showmax was debiting my account daily for the R99 subscription and because there was no money in my account I was getting bank charges.

To date my bank charges have run to more than R215 on there accumulated R8.60 charged due to Showmax.

I contacted them and was told by email that they will attempt to debit my account continuously till they get the R99.

I have never in my banking years had a service provider debit my account daily, I have in the past fallen behind with my phone bill, and before I closed my multichoice account there where months when I couldn't pay for its services but never had once had a service provider do what Showmax did. Is this legal?

JP