[TeMPOraL]

Yup. Make it an extra step after confirming my account is closed.

I probably don't hate you, but if you make this as an interruption to me cancelling, I very well just might.

Also, I think having just a free-form text box is best. The text of options in the radio list of reasons tells a lot about the mindset of the company. Quite often, not the nicest things.