******* DEBIT ORDERS & TERRIBLE INCONVENIENCES!!!!!!

I have a cellphone contract with Telkom ,which apparently is in arrears due to non-payment ,however after countless calls to their customer service depatment and their collections company" Nudebt ",who have the rudest staff that have the audacity to tell me that there was no money in my bank for the payment to go through and I need to learn to stick to my agreement and pay my account! Anyway after getting to a point of humiliation and screaming ,they apologise and explain to me that Telkom actually didn't request for the debt order in the month of May which caused all the unecessary calls from this terrible collections company ,!!!!Moreover this said company has been making ******* debit order transactions off MY bank that they were NEVER given permission by me to do !!!!. So I need to know from Telkom why has this inconvience been brought upon me due to an error in their system and WHO GAVE THEM THE RIGHT TO ALLOW ANOTHER COMPANY TO TRANSACT ON MY BANK ACCOUNT !!!!!!