FRUSTRATED with online banking login in repetitive error - password incorrect!

I do not uses the FNB online banking option very often, however from time to time, I am required to use it instead of the App. However, from as far back as I can remember since the website was upgraded, I have had this very problem. When I try to log onto the online banking website, I am told my password is incorrect. I go through the process to reset my password and login fine and do what I needed to do. The next time, same problem and procedure. However today, after resetting the password, I was told I had to authenticate my digital profile by visiting an ATM before I could use the website, or my app after changing the password. I did so. Got to work and logged on to be told my password is incorrect again! tonight I have reset my password for I think the 3rd time today and have now been asked to go authenticate myself at an ATM again!!! for the 2nd time in one day. I phoned FNB about it this morning to be told its my browser of the computer I am using , however the same problem occurred on my MAC at home and on my work laptop being a Windows operating system. When I called in this morning I was told the query would be logged and someone would call me. I am now stuck not being able to use my banking app or online banking at all, yet I am still waiting for a phone call. On my third attempt to reset my password, before being asked to authenticate at an ATM for the 2nd time today, I attempted to change my username as well as it has been the same for probably 10 years, only to be told that an OTP would be sent to my old cellphone number, which I had since changed nearly a year and a half ago with my bank. WHAT IS GOING ON? This is really ridiculous!!!