Welcome to the Community!
Thanks for reaching out to us. I'm sorry that this is under the circumstance of you canceling your service, although, I can understand the reason behind your request. I can have our Escalations Team contact you to discuss how to go about your request. Can you PM me the customer ID/username of the account you wish to cancel, your best contact number and preferred date/time for a call back?
For your reference: How do I private message (PM) in the community