Discovery Bank - bad customer experience

I have recently joined the Discovery bank, this is possibly the worst customer experience I have ever received.

No one comes back to you,they ignore phone calls and emails and they can't change any of your personal details.

I have spend over 2 hours waiting on the phone with no response.

I just want to cancel my account with them however that also seems impossible.

The lady Ofentse just sent an email without explaining, however they expect me to call.