Cancelled my subscription last month, but this month was charged again.

Is there any one that I can talk to or email with to help me get this resolved once and for all?

In April I signed up for an account, paid for the first month, but decided that day to not use Azure. So, I cancelled the subscription. I'm ashamed to say that I hadn't been checking my bank account for the last several months but when I did I noticed the subscription was still active. Arrrggg. I was only able to get two months reimbursed and I cancelled my subscription again. I also got an email from Azure saying they couldn't reimburse more than three months and that they would cancel my subscription.

Does anyone know how to get a reimbursement for this month's charge and the absolutely cancel, delete, or drop into a black hole my account so that I don't get billed again?

Thanks.