I was trying to permanently close my account, too. After submitting my request 2 weeks ago and not hearing anything back, I went for the "data deletion" instead.  But it said I had to change my account so that I was not the primary contact.  I didn't feel comfortable doing that, but it also gave a button where I could say I did that, so I said I did that!   Then the response was to look for an email confirming the data deletion.  I hope it works!