Internet banking issues

Good day. I called in since last Wednesday for literally anyone to assist me with an issue I had with my internet banking. Wednesday 07th October Called in to advise that I checked my app on Tuesday evening and there was a R2000 on my credit card unaccounted for. I transferred R10000 into my credit card on the 25th September and withdrew a R500 from there on the 2nd October and there was a balance of +/- R7500 on there on Tuesday 06th October. Then on the 07th October I suddenly couldn’t log into my app. I was told to answer questions for the security check that weren’t even audible and then told I failed the test so I couldn’t be helped. Thursday 08th October Called in again with the same problem – told to come into the bank as they couldn’t assist me since I failed the security check the previous day. Friday 09th October Called in once again with the exact same problem – I tried logging in via my laptop on the Friday, that is the reason I couldn’t log into my mobile banking app. Never mind the fact that I couldn’t log in since the Wednesday morning. I was also then told to uninstall the app and reinstall it – same problem. I was told it was my network – switched between mobile data and wifi – same problem. Monday 12th October I go to the bank where the line is ridiculously long and I have to be back at (my week old) job within half an hour – not helped and had to turn around. Tuesday 13th October Literally the same as the above. Called in again and told to… go into the branch. SO, now I have am beyond frustrated, still cannot get into my app for anything, would still love to see where that money disappeared to and cannot even move my money in my account to a different bank ASAP as I would more than likely have to go into the bank again or transfer from an app I cannot access. I just need someone to tell assist in some or another way as I literally cannot leave the office to stand in a line for no reason again.