R6700 incorrectly debited from my account

i was missold a LTE router contract by Telkom mobile. After a week of the trial period we decided to return the device which was completed. The R150 connection fee was eventually refunded and we thought this was the end of all. A month later my account was debited with R450 - for a service i didn't have. With some trouble i got it refunded and was promised that account was closed. At end of the next month my debit orders bounced. Telkom debited my account with R4550! Some penalty for not canceling in time... What??!! 4Phone calls later i was told it would take 7days to refund. Tuff luck for my debit orders. I got it reversed by my bank. Spoke to manager eventually who promised to personally escalate my complaint and assured me again the account is closed. She gave me an incorrect email address. No response on genl enquiry emails. This weekend they debited my account AGAIN with R1550! On enquiry, oh sorry, little error, but dont worry, the account is now really closed. I will have to go to my bank again to have this hopefully reversed. Manager again called me back, just apologised, but no action taken and not able to forward my complaint to complaints department! HOPELESS!