Debicheck

I received an sms today saying that i was in arrears with my nedbank personal loan. Knowing this was not possible i immediately called nedbank, the gentleman said the debit order was set for 25th, i told him that wasnt so that when i took the loan i said last day of the month , he insured me all was well. Then around 7pm i recivered a call from a lady at nedbank, extremely rude and spoke over me, insinuated that i said debicheck was for 25th, i told her that i already spoke to someone about it but insisted shes from collections and i eventually put the phone down as ahe wouodnt let me soeak, Really 7pm, the insinuation? I would like nedbank to check the recording of this as well as the loan application recording where i specified month end, if i get listed on itc with any of this i will be forced to take legal action, and this from a bank i have been with for over 20 years, shocking