Telkom debit orders equals theft

So as per usual Telkom is the number 1 to complain about.

I ordered a Telkom adsl line and I paid for the initial 1st month which is perfectly fine.

They arranged to install the adsl line only after 2 weeks of waiting.

I then decided I don't want the service to be provided within the 1st month and I canceled any arrangements to come to the house to install the adsl.

So they kept on billing me after that and I've lost more or less R400 from their sneaky debit orders even after I canceled the service within the same month.

Since I stopped all the debit orders from them they keep emailing me invoices which have amounted to R1100 which I will not pay because I canceled the service and no matter who I try speak with on the phone they keep trying to debit my account.

In all fairness I paid for the 1st month and from there on you ow me R400.

I have 4 different references of which don't help when I ask Telkom to look them up.

I'm just totally done with the poor serice and the audacity to keep on talking my money after I have canceled the service.