Customer always comes first

This is now 2 months going & calling Nedbank greenstone, the matter was even escalated to the Branch manager Tess who was worse than Lucricia (the reason behind the billing problem, her team leader who never bothered to even call to give me progress after spending at least a month going to Nedbank & she advised me to stop coming as she was going to call me back then after waiting 3 weeks without response decided to escalate to Branch Manager who is worse than the first 2. She Always promised to call me back before end of business day every time I call her but to date she hasn't bothered & my money still not refunded.