Called in today (been just over a month since the last call) and got a new excuse this time – on Aug 9 (or 16) they switched to a new system so my old reference number was no longer valid! When he looked up my record from my email address, he saw that I contacted them April 21 and requested deletion but nothing had happened. I told him I suspect that they have no actual policy for removing accounts and just use them to inflate subscriber numbers. He said it was a valid theory. I repeat, the tech support rep said it was plausible that they have no deletion method so they can inflate their numbers! I got a new reference number for next time.