Not listening to understand...listening to reply

I have taken a personal loan with nedbank i went to the Gateway branch to change debit order date so the consultant said that is done via a phone call so he put me on the phone with another consultant I informed the guy that i was speaking to that my pay date changed i used to get paid on the 25th now i get paid by the first so i want to change my debit order date to the 2nd so today I received an sms stating that i missed my loan payment why is that when i did my part by going and changing the date i really dont have all the time to go to the bank i only get an hour break ....as all yourlz calls are recorded i did ask the guy before he put the down if he sure the date is changed he said yes so why did I receive the sms ...maybe nedbank consultants should listen to understand their customers instead listening to reply