WHY DID DISCOVERY BLOCK MY CREDIT CARDS????????

I am so angry with disc bank!!!!!!! I recently got the new disc bank credit cards. I went out today for a day of shopping and guess what... both my credit cards didnt work!!!!!!! WHY DID DISCOVERY BLOCK MY CARDS?????????? You left me STRANDED! I barely carry cash! I WAS SOOOOOOOOO EMBARRASSED! i HAD TO LEAVE THE MAJORITY OF THE THINGS AND WALK OUT!!!!! On the discovery website, it clearly states that my credit card are active. Active my ASS!!!!!!!! What if I was overseas and want to use my credit card????? WHAT THE HELL ARE YOU UPTO??? SO ***********!!!!!!!!!!