Gave 30 days notice! Didnt cancel

I cancelled my service after 2 months of bad internet. I kept calling and emailing to ask for help for assistince. The customer care line were adiment that it was Telkom (Openserve). They came 2 in in months time. Found nothing wrong. By the way if Telkom finds not mistake you get a bill of R266 for call out fee. Openweb just said it was nothing at their end. So I cancelled. I send an email asking to cancel my service. I received an email with a link to cancel, I followed the link and completed it. I received an email saying they received my mail and with a service ticket. This was on the 20 July 2017

After end of September I was happy with my new service provider, They let another debit order go through. I send an email telling they made a mistake I cancelled.

Sending emails for 2 days. They will now cancel my service but refuse to reverse the debit order.

I am still sending mails but receive ****y remarks.

Terrible service! Never take openweb!