Impossible to get a reply from Discovery Bank

I have belonged to Vitality for years and worked hard to keep my points up so that I don't pay for my gym membership at Virgin Gym. Now Discovery changes the goalposts and in order to qualify for this membership you need to be more tied into Discovery and have a Discovery Bank account. In order to do so you must go onto the Discovery app and you can request a callback from one of the agents to assist you. Over two weeks later I am still awaiting a callback. I have emailed Vitality three times and no one attempts to help. I have tried three times this afternoon to phone the number for Discovery Bank. The automated reply asks for the ID number followed by the hash key ... after which nothing happens. So I can't contact them telephonically. So it feels impossible to talk to anyone from Discovery Bank. At this stage I am contemplating cancelling my medical aid with Discovery and my vitality membership and changing to momentum.