Standard Bank customer service is horrible

I had withdrawn money from my account on the 4th of January 2025 and had money left in there. The next day the 5th of January 2025 account was in a negative balance. I had chatted an agent and she couldn't assist me referring me to the bank. I had called in and spoke to someone she had explained this was a pending transaction. The money had been deducted during the transaction and now only it was cleared so I don't understand. There has been some sort of glitch on my app and I had even sent a written email to and I was just sent today we are working on it with no sort of update on what's being done my credit score is being ruined by an error made on your end this is unacceptable I am very disappointed in the services of this bank