Standard Bank Dont Respond!

I have been a Standard Bank client for 38 years and this is the worst service I have received from them. On 29 May, I wrote a review about the unilateral changes to cut-off dates on my credit card. I received an automated response from "Complaint Resolution Centre" promising that a consultant would contact me as soon as possible. No one called. On 31 May I wrote another review stating that they do not take this review seriously. I received another response saying they will check who my complaint was assigned to and get them to contact me. It is now a week later and I still do not have a resolution!