Poor Response - Standard Bank

I noticed ********** activities on my Credit Card which was done via on-line purchases. I contacted the bank, and even went into the branch the same day where a consultant helped me log the complaint with their ***** department (21 June 2022). I tried contacting the ***** line on numerous occasions and waited on the line for over 35 minutes without being able to get assistance. Waiting this long on the phone to get through is ridiculous - I don't have all day, as I am at work! I sent an e-mail to the address provided - this was acknowledged as being received. However, no response. I sent follow-up emails, with no response at all! I then tried to get hold of my private banker's details via e-mail. Again, no response! Today is 18 August 2022 and still no response from the bank! I am a customer of the bank for over 45 years, and find this totally unacceptable!