Should the gas supplier reimburse me?

Well im on a low income tariff on gas and electric with edf, only recently changed to due fuel. They sent me a card out that didn't work, so i had send it back. I ran out of gas on Sunday! So national grid came and put on emergency credit. As its not my fault that i'm left without a card(still not received a replacement) am I entitle to a refund of the difference between standard and emergency rate and should I complain that i still don't have a card!