Can customer support still see chats in an account that I deliberately deleted?

sh33tak1s

I cut off a conversation with CS since that account was no longer involved or necessary in a recent data transfer issue that I am going through. I said some things to specify the deletion of the account but I'm not sure if they will even be able to see it since the account is now nonexistent. I now feel like I should've probably waited until they did reply but it's too late.