Frustrations over and over

I have not been struggling to sort my Healthy Food card for 7 weeks. I ordered and re-ordered cards. Early this week I complained again. The next day I received 4 cards in the post, dated differently as I obviously ordered and re-ordered. Great job SAPO. Then an agent responded to my latest request for a card and issued me a new card number and yet another card in the post. My question: Can I use the cards I already received? This is so frustrating..... Why is Discovery Vitality so cheap skate that they can't use a proper courier? Please respond to me this time and not my wife.