Unauthorised Debit Order

After agreeing telephonically to a Telkom ADSL data line with a Telkom representative on 15/11/2017 I found that Telkom gave my banking details to a Third party namely Hotspotter and they are withdrawing R139.00 per month from my bank account. I never agreed to this. I did not ask for this and I did not once make use of this service as I ended up not installing the Telkom ADSL line. This is ***** and I will be laying a charge of ***** at the police station. I understand that it is near impossible to get this "service" , which I did not authorise stopped. I've been to the Telkom shop, spoke to numerous Telkom departments telephonically - All unable to stop this. I want to know what Telkom is going to do to fix this and what they are going to do about giving my banking details to a 3rd party.