Did you try all 3 numbers? I couldn't get through on 01 or 05, but when I tried 03 I got through with no problems. I ended up voting for him 50 times! (Seems like a lot to me ... though I know I'm a piker compared to some here.) OTOH, I am on the West coast and I didn't start to vote until nearly an hour after the show was over. That could have made a difference.
As I said before, the voting process leaves a lot to be desired. No one can convince me that the vote wasn't decided in advance. The producers wanted Carrie to win. Simon told Carrie that her accomplishments put her over the top (can't remember the exact words, but I remember Simon's self-satisfied smug face when he said it.)
Da votin' is rigged, IMO.