Urgent Resolution Needed: Incompetence in Nedbank's Collection Department

I am deeply disappointed with the service provided by Nedbank's collection department. Despite having settled my dues and even having a credit due to me on my credit card, I have been consistently met with incompetence since February 21st when I first reached out regarding this matter. Each time I call, I am met with promises of escalation to managers, yet no resolution is in sight. This indicates a glaring lack of proper escalation procedures within Nedbank, or worse, a deficiency in the competence and effectiveness of the managerial staff. I urge Nedbank to promptly issue me a paid-up letter and refund the credit owed to me.