Inconsistency and Incompetency

This is probably the 100th time that Nedbank have frustrated me because of its *********** stuff. I opened an investment account with this bank which i later realised was the wrong one i wanted. I called them in August to change the nature of the account and they said they cant until the account matures(it did mature and i didn't realise because they don't call, sms or remind their clients). I called in again after November to rather close the investment and they told me that it can be done at branch. Today sneaked out of work at lunch time and went to Nedbank(Midrand, Boulders), waited for a good 35 minutes only to be told there is nothing they can do. On the phone someone says something and in branch something again. Am confused if these people really know what they are doing, i pretty sure one day pple will wake up with no money in the bank accounts and the bank will say they don't know.