Very poor service from Momentum Health

Momentum health has really upset. We urgently need medical aid membership certificates which they say have emailed to my wife and I. We have repeatedly told them that nothing was received in our inbox or spam folder. Trying to get through to their call centre is also a nightmare. Getting to speak to a consultant is a 1 in a million probability. These companies market and brand themselves so well in the media but struggle to get simple stuff right. I even wrote to their complaints inbox today. Not even an acknowledgement!