Discovery plastic membership card

We are on the Discovery Essential Smart Plan, but since joining in Febr 2018, we have not received any confirmation of membership/membership cards through the post.

We called the Call Centre asking why we have not received anything, and they responded that, since we are on the Essential Smart plan, no membership cards are issued since we have to use the Discovery App and digital cards. However, this was not stated in any guide/document when we read up on the Plan before joining.

We would like to received actual plasctic membership cards. The reason - when visiting the hospital or a doctor, they always want a copy of the membership card for their records - how are they now suppose to obtain a copy when we do not even have cards, only a digital screenshot? Even when in an accident, emergency workers normally search for medical aid cards to know who to contact, etc - without a membership card, no access is available to this information as cell phones all have passwords/patterns to block unauthorised access. Ho difficult is it to understand that?