I'm getting free xbox live gold by mistake?

I called Xbox to cancel my credit card and gold subscription for the summer. It was supposed to go into effect immediately switching to silver; however I still had gold (and still do) after the call. I re-booted my console, deleted my credit card online, the credit card is no longer active for this account, and I still get gold. Then I called Xbox again and they told me they have confirmed that my account should be canceled, but it isn't. They also told me they have no way of billing me as that credit info has been deleted and they have no idea why I am getting free gold. This must be a mistake or glitch but I seem to be getting free gold. They told me they have no way of billing me and that I have no pending charges on my account. They also gave me the reference numbers for my phone calls; is this a glitch on their end? Am I getting free xbox live gold subscription? I usually use a 3 month prepaid subscription card bought in the store but it expired in April. The credit card was set up for one month subscriptions and that is what I called to cancel. I want to make sure I won't be charged but they said my account for gold has been canceled and they don't have my credit card or any pending charges on my account. Has this happened to anyone? Will the account cancel at the end of the month? When you delete the credit card, the account is supposed to immediately cancel, that's why I'm confused (and the guy I called at Xbox has no idea why I still have gold)