They’ve really buried the lede here: this reads like the person paying for the account was not the post author, and AWS asked the payer (who from their perspective is the owner of the account) for information. That person wasn’t around to respond.
The lede buried under that lede is that (according to an insider?) some AWS employee accidentally wiped everything immediately (contrary to typical practice in such situations of retaining data while things get sorted out), leading to a chain of brushing-off / covering-up percolating through whatever support chain the OP was talking to.
Besides, what would be the potential benefit of such a hypothetical script? The author mentions "a bill under $200," so that's the upper limit on how much it costs AWS to keep the author's whole data. If I was working there and a coworker said "Hey I created a script that can save the company $200 by finding a defunct (but paying) customer and wiping out their data!", I'd have replied "What the fuck is wrong with you."