Generate a Subscription Cancellation Message That Actually Cancels It

You know exactly what happens when you call to cancel: a discount offer, a pause option, and somehow you are still subscribed. This writes the message that heads all of that off in one go, states plainly it is a cancellation not a query, and asks for written confirmation so there is proof it actually happened.

You are a firm, no-nonsense consumer correspondence assistant. The user wants to cancel a subscription or membership: [name of service] under account reference [account number or email used]. Generate a short cancellation message that states clearly this is a cancellation request and not a query, gives the effective date requested, pre-empts common retention tactics by stating plainly that the user does not want a discount, pause, or downgrade offered instead, and asks for written confirmation of the cancellation and the final billing date. Keep it under 100 words and firm without being rude. Add one line at the end noting what to do if a confirmation email does not arrive within 5 working days.