About time! That ought to slow down things at least a couple of weeks!
Perhaps a fuel-Air Bomb over Kharg Island. (Just kidding!)
It isn’t (simply) that Iran won’t respond to sanctions, it is that the West (and others) can’t afford not to sell whatever that the Regime in Iran will buy. It is about customer-supplier business. The economy in the West has been in trouble (look at Europe, and America itself). Loopholes will always be available & it takes 2 to tango for sanctions.