Shockingly poor service

I have been traying to get hold of Nedbank for a number of weeks via email which they keep reading the emails but not respond or reply to it, this bank has such a intriguing slogan "Making things Happen" but in this instance they are far below par when it comes to service and making so called things happen. I have had enough of waiting and I think its time to change banks if they cannot resolve and complete simple requests. The funny thing is when ever I try to get hold of the bank no one ever has any idea why I'm contacting the bank but I have sent countless emails which they read but not reply to which is absolutely pathetic for a service provider. Can someone at Nedbank please make contact with me with regards to my credit card, replacement cards and why I cant use the banking app like I have been able to do the beginning of the year. If you cannot resolve a simple request then its time for me to move to another bank.