How do I unlock my pantech matrix? It says invalid card.?

I was changing all my pins and I changed my first pin okay but my second pin I tried to change and I used up all 3 of my tries. When I turned my phone off and on again it asked for my puk pin and I didnt know it so i was guessing. I used all 3 tries and now my phone keeps saying invalid card. what do i do t get it to work?