Not being assisted the way other branches

We have a social Club and a our account is with Nedbank. Last week we went to put in a notice on our account so that we can get our money by mid December. We have three signatories in our social Club but with Nedbank you can put in a notice with only two signatories as we have been doing with other branches. So my Question is why did the lady at Nedbank Arcadia failed to help us with two signatories but other branches do assist us like it happened last year. I was so angry with the service we have received and I still am. Yes our account on the system says we have three signatories but they explained to us the day we opened this account with them that even two people can sign but with Nedbank a rcadia we can't, WHY?