Hey,
Just letting you know, I have a similar experience. I also thought I got hacked but when I looked at the details of the transactions, they were the same I tried to push through the week before. I posted my story here:
https://bitcointalk.org/index.php?topic=1927483.msg19156763#msg19156763 I just contacted Blockchain.info because it's past 72 hours when they said it should resolve.
I was communicating with them using email. I just found out that you can log on this website
https://support(dot)blockchain(dot)com/ to access your Support Tickets with them. It's a lot easier than trying to dig up your emails.
Let me know how you go. I'm also am quite confused. I am worried that after waiting this long, the transactions get resolved but will my blockchain.info wallet re-send past transactions again, over and over, in an infinite loop as you say. Which, as I understand it, is not good because your wallet gets flagged for double-spending and of course I want to be able to eventually move my Bitcoins out of that wallet.