Disappointed and Frustrated

I received my discovery card in Sep 2018 which was an amazing process because it was efficient and very professional, however i was sent an email on the 17 Oct 2018 by discovery card informing me that if i activate discovery miles on my credit card i would receive 4000 miles. So i did activate and to date no 4000 discovery miles were credited to my card. The other query i had was that when i tried to use my discovery miles on 15 Nov 2018 that i earned through purchases after activation it got reserved but my purchase failed because of a problem with the discovery miles platform. To date after logging several queries nothing has been done nor feedback received to return my miles. I am very disappointed with the service i received. Can someone please help, thanks