NO HELP ON UNAUTHORISED DEBIT ORDER

Im very disapointed with Nedbank. There is a debit order that is going out on my account from Aug 15. The debit order is for a company called TELESA. The debit order is going with a reference TELESA TL310815S***. I have not authorised such a debit order. I do not know how the debit order was authorised.<br> <br> I called the nedbank Debit order trace department they gave me details to contact a Dane Dewet on *** i contacted the number and spoke to a lady who further directed me to a lady by the name Onica on ***. when i called her last month she then told me she will cancel the debit order. I asked to know why it was put in place first and what do they have on record that allowed them to debit. She was very rude and told me the debit order was for the company in Durban. she gave me the number *** and asked me to call them for refunds. I contacted the number and spoke to a lady there who told me i must contact a Mr Jeremiah on ***. I tried in vain to contact this gentleman and his phone said it is not provisioned to receive calls. I tried today again to get hold of the lady who confirmed debit order was cancelled in vain. Nedbank said they cant help me.