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!
