Shocking Bank Service

I have been having technical issues with my Nedbank App. I logged a call on Sunday and was advised it will take 2 days to resolve. When i contacted them again on Tuesday it was advised it will take 3 days. It has now been longer and no one can give me an answer as to why this issue is not resolved. Your agents keep cutting off my chats...it seems as if they don't know what is going on? why

They have advised it is a technical issue that the IT department cannot sort out???? I'm not sure how this is possible 5 days later, i keep on asking them why but nobody knows....why?

I then requested steps to close my account and that could not even be given to me. Im sure nedbank is a well established bank, why can none of your agents help me resolve my issue or at least give me an answer why it is not?