Discovery bank does not know how to call back

Very disappointed in the service given. Called 3 times on Thursday 29 August and was promised call backs on all 3 occasions and it is 2 days later and still waiting for a call back. Spoke to Thabi, Jonathan (Credit Department) and Ruth (banking assistant) . Relationship with Discovery Bank started so well and was considering moving my whole portfolio to Discovery but after this experience I will be staying where I am. Absolutely terrible customer service.