No customer service at standard bank

In March I app**** for a loan on the app and never got a response, I called several times to find out what was going on and I was told that they can't help me because the people who deal with the app application can't be called and I was told that they will send an email. I called the following week and I was told that they haven't responded and it was escalated to the manager in that department. My last call was when I called their complaints department to escalate this and they promised that they will investigate and come back to me within 3 days. That was in March now we are in June nobody has called me.

Last week I tried to open a savings account on my app and it kept giving me an error, I called and I was told that they will call me in 24 hours it's Thursday today and nobody has called me. Standard bank customer service sucks and it is frustrating that even when you call them, you still don't get any assistance, even when you escalate no help still. So what should customers do when they have queries now?