Systems constantly offline and preventing important financial actions to be performed

What on earth is wrong with your systems lately? Two weekends in a row I go to the Mall of the South branch and systems are offline, and from what I was informed, the systems have been going online and offline constantly. The app lately has also been extremely slow or it doesn't login at all (and I tested my network speed and nothing was wrong with it), some features of the app keep failing as well. I tried buying airtime using the app, it kept failing because the service provider was unable to process the transaction. I used my service provider's USSD code to purchase a bundle and everything works. I use the Nedbank USSD code to buy airtime without airtime and it failed at the end, so the problem is sitting with Nedbank. I have read that the banks in South Africa are being hit by distributed denial of service (DDoS) attacks. If this is the reason your systems are constantly down/performing poorly lately, it is absolutely shocking that something like this has not been contained in it's second week of down time. I also need to urgently release funds from an investment account and I can't because your systems are always offline. How do you expect customer satisfaction when the customers can't do anything with your service?