Double charges on Standard Bank credit card

For several years now, I have been in a battle with Standard Bank to resolve the matter of double charges on my credit card. Several members of staff have confirmed the double charges were erroneous and promised on several occasions, to escalate the matter but since I have NOT RECEIVED A SINGLE CALL OR EMAIL FROM ANY FIGURE OF AUTHORITY, I can safely say that these were promises made by faceless people to pacify me for the moment.

Numerous phone calls to their card division have left me frustrated and irate, with the many unfulfilled promises to help get the matter straightened out, this after being on hold for a minimum of 30 minutes. Emails and physically going into a bank have all proved unfruitful. Several months ago, I deliberately withheld a payment of just R200, lo and behold I receive anything from 2 - 5 calls DAILY, asking for payment.

Standard Bank, YOU ARE UNPROFESSIONAL, HAVD NO REGARD FOR YOUR CLIENTS, DO NOT KNOW THE MEANING OF SERVICE, ARE DISHONEST AND DISINGENUOUS.

Read your statements especially if they're from Standard Bank.